Johnson County Auditor Guide for Property Records, Taxes, Elections and Official County Services
This page is for users searching “Johnson County Auditor” and expecting more than a link list. In Johnson County, Iowa, the Auditor’s Office is tied to elections and voter registration, county accounting, real estate ownership records, levy/rollback work, tax calculations, plat maps and parcel information routing.
The article also explains the nearby offices users often need next: Treasurer for tax payments, Assessor for valuation, Recorder for deeds and land records, and GIS/parcel viewer for parcel maps and aerial property information.
Fast answer: the official Johnson County Auditor’s Office is in the Johnson County Administration Building at 913 S Dubuque St, Suite 101, Iowa City, IA 52240. For real estate, the Auditor maintains current ownership records for taxation, plat maps, aerial photos and road maps; compiles property tax levies; and calculates property taxes collected by the Treasurer.
Best workflow: use the Auditor Real Estate page and Parcel Information Viewer to identify the parcel, use the Assessor for assessed value questions, use the Treasurer for payment dates and online payment, and use the Recorder for land transactions, property ownership documents and recorded real estate documents.
Which Johnson County Office Handles Your Question?
Johnson County, Iowa is different from many Ohio county-auditor pages. The Auditor is important for elections, real estate taxation records and levy work, but the Assessor, Treasurer and Recorder handle related parts of the property workflow.
Need |
Use this official office/tool |
What it gives you |
Action link |
|---|---|---|---|
County Auditor office, elections, real estate records, accounting, minutes/agendas |
Johnson County Auditor |
Auditor office services including elections/voter registration, accounting and real estate records for taxation purposes. |
|
Parcel ownership records, plat maps, aerial photos, tax levy and tax calculation context |
Auditor Real Estate |
Current ownership records, property tax levies, tax calculations and Parcel Information Viewer link. |
|
Property assessment or value question |
Johnson County Assessor |
Assessment of residential, commercial, industrial and agricultural properties; real property revalued every two years. |
|
Property tax payment, payment history, tax sale, vehicle registration |
Johnson County Treasurer |
Property tax due dates, online payment path, payment history and tax-sale information. |
|
Deed, land transaction, recorded real estate document, property ownership document |
Johnson County Recorder |
Land transactions, property ownership records and online real estate document searches. |
|
Tax parcel number, address map, aerial/bird’s-eye photo, parcel map context |
Parcel Information Viewer |
Interactive map to search by tax parcel number or address and view assessment information, bird’s-eye photos and more. |
What the Johnson County Auditor Does
Elections and voter registration
The Auditor’s Office administers local, state and federal elections held in Johnson County and maintains voter registration records.
Real estate records for taxation
The Auditor maintains current property ownership records for taxation purposes, including plat maps, aerial photos and road maps.
Tax levies and tax calculation
Each year the Auditor compiles property tax levies and calculates property taxes, which the Treasurer collects.
Auditor area |
What it means |
Best user action |
|---|---|---|
Elections |
Voter registration, election administration, election results, early voting and polling-place support. |
Use the elections page or call 319-356-6004 for voter-registration questions. |
Real estate |
Ownership records, plat maps, aerial photos, road maps, tax levy calculation and parcel viewer access. |
Start with the Real Estate page and Parcel Information Viewer. |
Accounting |
Accounts payable, payroll, monthly expenditure, revenue and payroll reports, detailed county-fund ledgers. |
Use Auditor accounting for accounting-report questions; use the county Finance department for deeper budget/policy information. |
Rollback and levy schedules |
Iowa rollback percentages and levy rates affect tax calculations. |
Review rollback and levy pages before assuming assessed value equals taxable value. |
Maps and plat books |
Road maps and plat books are available through the Auditor’s office. |
Pick up road maps in person for free or contact the office for mailed map/postage details. |
Johnson County Auditor Real Estate Records
Current ownership records
The Auditor maintains records of current property ownership in Johnson County for taxation purposes.
Maps and aerial photos
Public records include plat maps showing current ownership, aerial photos showing ground cover and other physical attributes, and road maps.
Levies and tax calculations
The Auditor compiles levies and calculates taxes, but those taxes are collected by the Treasurer.
How to Use the Parcel Information Viewer
Open the official Parcel Information Viewer
Use the Auditor Real Estate page link labeled “Use the Parcel Information Viewer,” or go directly to the county’s parcel viewer.
Search by tax parcel number or address
The official Real Estate page says the interactive map supports searches by tax parcel number or by address within Johnson County.
Review the assessment and map context
The viewer can show property assessment information, bird’s-eye photos and related parcel details.
Copy the parcel number
Use the parcel number when switching to Treasurer payment records, Recorder document searches, Assessor questions or Auditor real estate questions.
Use Recorder for document proof
If you need a deed, mortgage, land contract or recorded ownership document, switch to Recorder records instead of relying only on the parcel map.
Property Taxes: Treasurer Due Dates, Payment and Tax Sale
First half due
First-half property taxes are due September 1.
First half penalty date
The last day to pay first-half taxes without penalty is September 30; mailed payments must be postmarked by September 30.
Second half due
Second-half property taxes are due March 1.
Tax sale
The Treasurer’s Property Tax Sale is held in June, and participants must pre-register at the Treasurer’s office.
Tax task |
Correct office |
What to do |
|---|---|---|
Pay taxes online |
Treasurer / Iowa Tax and Tags |
Use iowataxandtags.org or the county Treasurer page to pay property taxes online. |
Find tax payment history |
Treasurer / tax history lookup |
Use property tax payment history or tax payment history lookup tools linked from the county real estate information page. |
Understand how taxes are calculated |
Auditor |
Review tax calculations, levy schedules and rollback details. |
Question assessed value |
Assessor |
Contact the County Assessor because that office assesses property and revalues real property every two years. |
Need recorded ownership proof |
Recorder |
Use Recorder real estate document searches or Iowa Land Records for recorded instruments. |
Iowa Rollback: Why Assessed Value Is Not Always Taxable Value
Iowa rollback is one of the most important details for a Johnson County property-tax article. The Auditor’s rollback page lists the 2024 rollback used for taxes payable FY 2025–26.
Property category |
2024 rollback for taxes payable FY 25–26 |
Plain-language meaning |
|---|---|---|
Agricultural, excluding agricultural dwellings |
73.8575% |
Agricultural land is taxed on a rollback-adjusted portion of assessed value. |
Residential, rural and urban including agricultural dwellings |
47.4316% |
Residential assessed value is multiplied by the rollback percentage before levy rates are applied. |
Commercial realty, first $150,000 tier |
47.4316% |
The first tier receives rollback treatment similar to residential for the listed year. |
Commercial realty, value over $150,000 |
90.0000% |
The higher tier is taxed on 90% of value. |
Industrial, first $150,000 tier |
47.4316% |
Industrial property also has tiered rollback treatment. |
Industrial, value over $150,000 |
90.0000% |
The value above $150,000 uses the 90% tier. |
Railroad property |
Tiered: 47.4316% / 90.0000% |
Railroad property follows the listed tiered schedule. |
Utility property |
100% |
Utility property is not rolled back in the same way for this schedule. |
County Assessor vs Auditor: Value Questions Go to the Right Place
Assessor role
The County Assessor assesses residential, commercial, industrial and agricultural properties.
Revaluation cycle
Johnson County real property is revalued every two years.
Assessor office
The County Assessor is located at the Johnson County Administration Building, 913 S Dubuque Street, Iowa City, IA 52240-4281.
User question |
Correct place |
Why |
|---|---|---|
Why did my assessed value change? |
County Assessor |
The Assessor assesses and revalues real property. |
Where is current ownership shown for tax purposes? |
Auditor Real Estate |
The Auditor maintains current ownership records for taxation purposes. |
Where do I pay the tax bill? |
Treasurer |
The Treasurer collects property taxes. |
Where is the deed or recorded document? |
Recorder |
The Recorder houses land transactions and property ownership records. |
Johnson County Recorder: Deeds, Land Transactions and Real Estate Documents
Land transactions
The Recorder’s Office holds land transactions and property ownership records.
Online searches
The Recorder provides online real estate document searches, including a Recorder eSearch portal.
Revenue tax
Iowa Real Estate Revenue Tax is listed as $1.60 per $1,000, except the first $500 is exempt.
Recorder task |
Use it for |
Practical note |
|---|---|---|
Name search |
Grantor, grantee, owner, firm, lender or party searches. |
Use party names when you do not have a document number. |
PropertyCheck |
Monitoring or checking property-related recorded activity. |
Useful for fraud-awareness, but not a title-insurance substitute. |
Iowa Land Records |
Searching and submitting land records across Iowa counties. |
Useful for professionals and users searching multiple counties. |
Revenue tax estimate |
Understanding real estate revenue tax on transfer. |
Use the county Recorder forms/fees page for current fee rules before recording. |
Recorded ownership proof |
Deeds, mortgages, releases and other recorded instruments. |
Use Recorder records when Auditor ownership and recent-sale timing do not match. |
Elections and Voter Registration
Election administration
The Auditor’s Office administers local, state and federal elections held in Johnson County.
Voter registration
The Auditor maintains Johnson County voter registration records.
Elections contact
For voter-registration questions, use the Auditor elections page or contact the office at 319-356-6004.
Auditor Accounting: County Payroll, Reports and Ledgers
Accounts payable and payroll
The Auditor’s Office issues accounts payable and payroll for Johnson County.
Monthly reports
The office produces monthly expenditure, revenue and payroll reports.
County-fund ledgers
The Auditor keeps detailed ledgers for various county funds and performs other accounting functions.
Accounting contact |
Official detail |
Use this for |
|---|---|---|
Accounting Deputy |
Chris Edwards |
Accounting-office routing. |
Phone |
319-356-6004 |
General Auditor/accounting contact. |
Address |
Johnson County Auditor’s Office, Administration Building, 913 S Dubuque St, Suite 101, Iowa City, IA 52240 |
In-person office planning or mailed correspondence. |
Hours |
Monday–Friday, 7:45 a.m.–5:30 p.m. |
Planning a visit before deadlines. |
Road Maps, Plat Books and GIS/Parcel Map Use
Road maps
Johnson County road maps are available from the Auditor’s Office. Road maps are free if picked up in person.
Plat books
The Auditor’s maps/plat book page provides a route to order a plat book.
Mailed maps
For mailed road maps, prepaid postage is required; contact the office for more information.
Townships, Budgets and Fence Disputes
Township budgets
The Auditor township page links township budget users to the Iowa Department of Management; township officials are directed to contact the Auditor’s Office for password access.
Fence disputes
The township page includes a fence-dispute section with instructions and forms.
If a Johnson County Property, Tax or Deed Search Fails
Problem |
Likely reason |
Fix inside official workflow |
|---|---|---|
Parcel viewer search fails |
Address format, missing parcel number, rural address variation or city/township confusion. |
Try the tax parcel number if available; otherwise search by simpler address and verify in the map. |
Ownership looks outdated |
Recent deed recorded but tax ownership display not fully updated. |
Search Recorder records and Iowa Land Records for the recorded document. |
Tax bill seems wrong |
Rollback, levy rate, assessment, timing, payment/penalty or Treasurer account issue. |
Separate Assessor value, Auditor tax calculation and Treasurer payment questions. |
Assessed value is confusing |
Assessed value is not the same as rollback-adjusted taxable value. |
Check Assessor value, then Auditor rollback and levy-rate information. |
Need deed or mortgage proof |
The parcel viewer is not the recorded-document system. |
Use Recorder eSearch or Iowa Land Records. |
Need to vote/register |
User searched “Auditor” for elections, not property. |
Use Auditor Elections / Voter Registration page. |
Video Note: No Unverified YouTube Embed Added
I did not embed a YouTube video because a directly relevant Johnson County Iowa Auditor tutorial with verified upload date, thumbnail URL and safe VideoObject metadata was not confirmed. For this page, the official Auditor, Treasurer, Assessor, Recorder and parcel-viewer instructions are more useful than an unrelated video.
Johnson County Auditor Office Google Map
The Johnson County Auditor’s Office is in the Administration Building at 913 S Dubuque St, Suite 101, Iowa City, IA 52240. Use this map for in-person planning, but choose the right department before visiting: Auditor for elections/accounting/real estate records, Assessor for value, Treasurer for payment and Recorder for deeds.
Auditor
913 S Dubuque St, Suite 101, Iowa City, IA 52240. Phone: 319-356-6004. Hours: Monday–Friday, 7:45–5:30.
Assessor
Administration Building, 913 S Dubuque Street, Iowa City. Use for assessed value and revaluation questions.
Treasurer
Use for property tax payment, payment history, online payment and tax sale questions.
Recorder
Use for land transactions, property ownership documents, recorded real estate documents and real estate revenue tax questions.
Official Johnson County Action Links
The details above are included so readers do not need to leave for basic understanding. Use these official links only when ready to search, pay, file, download or verify.
Johnson County Auditor FAQ
Who is the current Johnson County Auditor?
The current Johnson County Auditor is Julie Persons.
Where is the Johnson County Auditor’s Office?
The Auditor’s Office is at the Johnson County Administration Building, 913 S Dubuque St, Suite 101, Iowa City, IA 52240.
What is the Johnson County Auditor phone number?
The Auditor phone number listed on official Auditor pages is 319-356-6004.
What are the Johnson County Auditor office hours?
Official Auditor accounting contact lines list office hours as Monday through Friday, 7:45 a.m. to 5:30 p.m.
Does the Johnson County Auditor handle elections?
Yes. The Auditor’s Office administers local, state and federal elections held in Johnson County and maintains voter registration records.
Does the Auditor assess property value?
No. The County Assessor assesses residential, commercial, industrial and agricultural properties, and real property is revalued every two years.
What does the Auditor Real Estate office maintain?
The Auditor maintains current property ownership records for taxation purposes, including plat maps, aerial photos and road maps. The office also compiles levies and calculates property taxes collected by the Treasurer.
Where do I search Johnson County parcels?
Use the Parcel Information Viewer linked from the Auditor Real Estate page. It allows search by tax parcel number or address and shows property assessment information and bird’s-eye photos.
When are Johnson County property taxes due?
First-half property taxes are due September 1 and may be paid without penalty through September 30. Second-half taxes are due March 1 and may be paid without penalty through March 31.
Where do I pay Johnson County property taxes?
Use the Treasurer’s Office or Iowa Tax and Tags online payment path. The Treasurer collects the taxes calculated from levies and rollback-adjusted values.
What is Iowa rollback?
Rollback is the percentage applied to assessed value by property class before levy rates are applied. The Auditor’s rollback page lists 2024 rollback percentages for taxes payable FY 2025–26.
Where do I search Johnson County deeds?
Use the Johnson County Recorder’s Office or Recorder eSearch. Recorder records include land transactions and property ownership documents.
What is Iowa Real Estate Revenue Tax?
The Recorder forms and fees page lists Iowa Real Estate Revenue Tax as $1.60 per $1,000, except for the first $500, which is exempt.
Are parcel maps legal surveys?
No. Parcel maps and aerial photos are useful for research, but for exact boundaries, legal descriptions, fences, easements or development decisions, use recorded documents and professional survey support.
Khushboo Bobade is the editor and digital publisher of CountyAuditors.org. She oversees the research and editorial process for the website, ensuring that information about county auditor offices, property records, and government resources is accurate, verified, and easy for visitors to understand.
10 Ohio Property Tax Calculators & Auditor Tools
Built specifically for Ohio's 35% assessment ratio, current DTE forms, and 2026 Homestead, Owner-Occupancy, CAUV, Conveyance Fee, and Board of Revision rules. Every number reflects verified Ohio Department of Taxation amounts.
Annual Tax Bill Estimator
OHIOApplies Ohio's 35% assessment ratio plus your county's effective millage tier — the actual math your auditor uses.
Homestead Reduction Calculator
DTE 105A2026 Ohio Homestead: $29,000 general or $58,000 enhanced (100% disabled vet, KIA spouse). OAGI under $41,000 required for non-veteran applicants.
Owner-Occupancy & Non-Business Credits
DTE 105CEvery Ohio owner-occupied home qualifies for the 2.5% Owner-Occupancy Credit plus the automatic 10% Non-Business Credit. Most owners don't realize these stack.
Conveyance Fee Calculator
ORC 322When you sell or transfer Ohio property, the auditor collects $1 state + up to $3 county per $1,000, plus $0.50 per parcel. Counties choose their rate.
CAUV Agricultural Savings
DTE 109Ohio's Current Agricultural Use Value cuts taxable value dramatically for farmland (10+ acres, or smaller with $2,500+ annual gross income).
Mill Rate Converter
Ohio tax rates appear three ways on auditor sites: mills, percent, or dollars per $1,000. Convert between them instantly.
Parcel Number Cleaner
Ohio's 88 counties each format parcels differently — Franklin uses 010-123456-00, Cuyahoga uses 001-23-456, Hamilton uses 100-0001-0001-00. Auto-detects.
35% Ratio Sanity Check
Ohio law sets taxable value at 35% of market value. If yours is significantly higher, you're a strong BOR appeal candidate.
BOR Appeal Savings
DTE 1A successful Board of Revision complaint typically cuts your value 10–20%. Filing is free and stays in effect until the next reappraisal.
BOR Deadline Countdown
MAR 31Ohio's statutory Board of Revision filing deadline is March 31 for the prior tax year. Miss it and you wait until next year — no extensions.
Verify with the official Ohio source
These calculators use the verified 2026 Ohio Department of Taxation amounts and statutory rules. For your exact bill, exemption status, and county-specific deadlines, always confirm with your county auditor and the Ohio Revised Code:
Estimates use Ohio's 35% statutory assessment ratio and effective tax rate tiers averaged across major Ohio counties. Your actual bill depends on local school levies, voted millage, inside vs. outside millage splits, House Bill 920 reduction factors (HB 920), and special assessments. The 2026 Homestead general amount ($29,000) and enhanced amount ($58,000) reflect HB 187 inflation indexing — your county auditor's office may show slightly different transitional figures. Nothing here is legal or tax advice. CountyAuditors.org is an independent informational directory, not affiliated with any county government.