The Mifflin County tax map is a free online parcel viewer hosted by the county’s GIS department. You can search any property in the county by address or parcel identification number, see its boundaries drawn over aerial photography, and open the assessment record tied to that parcel without visiting the courthouse.
Opening the Parcel Viewer
The viewer lives on the county’s GIS subdomain, not the main county website. Go to the Mifflin County GIS Web Mapping page and select the parcel application link.1Mifflin County Pennsylvania. GIS Web Mapping It runs on ESRI’s ArcGIS Experience Builder, so any current browser will load it without a download.2Mifflin County. MC Parcel Viewer
A disclaimer loads with the viewer. The parcel data is provided “as is” and should not be used in a legal proceeding. The lines you see are drawn from deed descriptions, not surveyed on the ground. For a boundary dispute or a setback check before building, you still need a licensed surveyor.
Searching for a Property
The viewer is built around land record lookups.3Mifflin County. Web Mapping Parcel Application Type a street address into the search bar if that’s all you have. If you’re holding a prior tax bill or a recorded deed, the parcel identification number on it will pull the exact record faster than an address will.
Once the system finds a match, it highlights the parcel and zooms in. Click the shape to open its record. Neighboring parcels stay clickable, so if you’re comparing adjacent lots or walking a block, you can move from one to the next without running a new search each time.
What the Map Shows You
The base layer is the parcel outline. These boundaries were originally drawn to identify land parcels for tax billing and assessment.4Pennsylvania Spatial Data Access. Mifflin County – Parcels You can toggle on aerial photography, including imagery updated as recently as 2022, to see structures, driveways, and tree cover against the legal lines.1Mifflin County Pennsylvania. GIS Web Mapping
Two overlays matter for anyone thinking about what a property will cost: municipal boundaries and school district lines. Your annual tax bill depends on which municipality and which school district the parcel sits in, and the spread is wide. A parcel in Wayne Township under the Indian Valley School District pays a total millage of about 46 mills. A parcel in Lewistown Borough under the Mifflin County School District pays closer to 70. Confirming jurisdiction on the map before you buy is the kind of check that prevents a surprise at the first bill.
Flood risk is not on this map. The county’s Planning Department links out to FEMA’s National Flood Hazard Layer Viewer and the Flood Insurance Rate Maps for that information.5Mifflin County, PA. Floodplain Resources If flood status is part of your decision, open the FEMA viewer alongside the parcel map.
Reading the Assessment Record
Clicking a parcel opens its assessment summary. You’ll see the assessed value broken into land and improvements (buildings, additions, other structures), the current owner of record, and the land use classification. These records are public, and anyone can look them up.
Mifflin County is a sixth-class county, and its assessments are governed by Pennsylvania’s Consolidated County Assessment Law.6Pennsylvania General Assembly. Title 53 Chapter 88 – Consolidated County Assessment Law The county assessment office maintains the official roll, and any change to your assessment must be mailed to you with the old value, the new value, and notice of your right to appeal.
The number that trips people up on the record card is the relationship between the assessed value and what the property would actually sell for. Assessed values in Mifflin County are not market values. The State Tax Equalization Board publishes a Common Level Ratio each year that converts between the two, and for the period from July 1, 2025, through June 30, 2026, that ratio is 20.91%.7Mifflin County, Pennsylvania. Millage Rates Assessed values sit at roughly 21% of current market value. A home that would sell for $200,000 carries an assessed value somewhere near $41,800. Going the other direction, multiply the assessed value on the record by 4.78 to estimate what the county considers the market value. The ratio also comes into play on appeal, where the board uses it to convert a fair market value finding back into an assessed value.8Pennsylvania Department of Community and Economic Development. STEB/TED Frequently Asked Questions
Turning the Record Into a Tax Estimate
Your total property tax is three bills added together: county, municipal, and school district. Each body sets its own millage, and one mill equals $1 of tax for every $1,000 of assessed value. The 2026 county-wide rate is 15.770 mills everywhere in Mifflin County.7Mifflin County, Pennsylvania. Millage Rates The municipal and school portions change by location, and the combined total for 2026 runs from 45.990 mills in Wayne Township to 69.511 mills in Lewistown Borough. The county’s millage rate page lists the combined figure for every municipality.
The arithmetic is straightforward. Take the assessed value from the record, multiply by the total millage for that municipality, and divide by 1,000. A parcel assessed at $50,000 in Armagh Township, where the 2026 total is 54.525 mills, works out to $50,000 × 54.525 ÷ 1,000, or $2,726.25 for the year. That total arrives as two separate bills, one covering the county and municipal portion and one from the school district.
When You Need More Than the Online Map
The viewer answers most lookup questions, but it has limits worth knowing. The parcel lines are not survey-grade, so a boundary question headed for a legal filing needs a surveyor. Flood zone status comes from FEMA, not from this map. And if your assessment looks wrong, or you think your land might qualify for preferential assessment under Pennsylvania’s Clean and Green program (Act 319), those are separate processes handled through the Assessment Office rather than the viewer.9Mifflin County, PA. Assessment Online Forms and Applications
For anything the online tools can’t resolve, the Mifflin County Assessment Office is in the Mifflin County Courthouse at 20 North Wayne Street, Lewistown, PA 17044, and the phone number is 717-248-5783.10Mifflin County, PA. Assessment Staff can walk you through discrepancies between the online record and a paper bill, hand you the right form for an appeal, and answer questions about Clean and Green eligibility.