Harrison County is south-central Indiana along the Ohio River — anchored by Corydon, Indiana's first state capital and the seat of Harrison County government. The county sits west of the Louisville metropolitan area, with Floyd County and the New Albany / Jeffersonville cross-river corridor immediately to the east. That positioning gives Harrison County a distinct mix: established small-town residential character in Corydon, working farmland across much of the county's interior, river-corridor parcels along the Ohio, and a modest but real Louisville-commuter footprint in the eastern townships.
The 2026 Form 11 Notices of Assessment arriving this spring carry the same statewide forces as everywhere else in Indiana: the DLGF cost-table reset that pushed AVs up across all 92 counties, and the SB 1 property tax reform package that changes how those AVs translate to actual tax bills.
Harrison County 2026 calendar: Form 11 notices typically arrive by mid-April. Appeal deadline is June 15, 2026 (or 45 days from notice date, whichever is later). File a Form 130 with the Harrison County Assessor's Office at 245 Atwood St NE, Suite 221, Corydon, IN 47112, phone 812-738-4280.
Corydon and the County Seat
Corydon is one of Indiana's most historically significant small towns. As the first state capital, the town carries a distinct historic district that includes the Old State Capitol Building and surrounding 19th-century commercial and residential stock. Properties within the historic district carry assessment considerations different from comparable properties outside it.
For Corydon homestead owners, the statewide assessment surge pushed AVs up in 2025, and the 2026 Form 11 reflects that growth. The combination of the 1% homestead cap, the SB 1 supplemental credit, and the supplemental homestead deduction increase from 35% to 40% will moderate the spring 2026 bill impact for cap-bound parcels.
The Louisville-Metro Adjacency
While not as deeply integrated with the Louisville housing market as Floyd County immediately to the east, Harrison County does see Louisville-metro buyer demand in its eastern townships. Owners in Lanesville, Elizabeth, and the unincorporated areas closest to the Floyd County line should expect their assessment trends to track Floyd County more closely than the county's western interior.
Three considerations for eastern Harrison County Form 11 review:
- Sale comparables span an east-west gradient. Eastern Harrison parcels track Louisville-metro demand; western Harrison parcels track rural southern Indiana trending.
- Indiana's tax structure attracts cross-state buyers. The 1% homestead cap and the SB 1 reforms make Harrison County competitive with Kentucky and Ohio jurisdictions.
- River-corridor land carries land-side weight. Properties along the Ohio River derive significant value from the land component.
What to Check on Your Harrison County Form 11
The general Form 11 walkthrough applies. Harrison-specific items:
Township Assignment
Harrison County is divided into thirteen townships including Blue River, Boone, Franklin, Harrison, Heth, Jackson, Morgan, Posey, Spencer, Taylor, Union, Washington, and Webster. A property near a township boundary should have its township coding verified.
Historic District Status
For properties in or near the Corydon historic district, verify that any historic designation is correctly applied. Historic district properties may qualify for restoration-related considerations.
Homestead Status
If you bought a Harrison County home in 2024 or 2025 and have not filed Form HC-10, your 2026 Form 11 will not reflect the homestead deduction, the SB 1 $300 supplemental credit, or the 1% homestead cap. File at the Harrison County Auditor's Office before May 10.
Ohio River Floodplain
Parcels along the Ohio River fall within FEMA flood plain designations. Flood plain status should be reflected in the assessment calculation — a parcel in a 100-year flood plain has materially different value from the same improvement on a non-flood-plain lot.
Karst and Cave Country
Harrison County contains substantial karst topography, including caves and sinkholes. Karst features can affect both assessable land area and improvement-side considerations (e.g., foundation conditions). Verify the recorded acreage and any influence factors on your Form 11.
Land vs. Improvement Split
For agricultural and rural-residential parcels, compare the land-side and improvement-side AVs on your 2026 Form 11 to the prior year's notice.
Harrison County and SB 1
The SB 1 property tax reform package layers onto the 2026 cycle:
| SB 1 change | Harrison County impact |
|---|---|
| $300 supplemental homestead credit | Applies to all Harrison homesteads on spring 2026 bills |
| Supplemental deduction 35% to 40% | Reduces taxable AV on homesteads |
| Business personal property exemption to $1M | Most small Corydon commercial owners qualify |
| Rental/farmland 2% deduction starts at 13.3% | Helps Harrison farmland and rental owners |
For Harrison County's farmland owners — meaningful in the central and western parts of the county — the new 2% farmland deduction is part of a broader farmland tax picture that includes ongoing pressure from DLGF base-rate adjustments.
The 2% rental and farmland deduction is not automatic. Eligible Harrison County farmland and rental owners must file the appropriate deduction form with the County Auditor's Office to claim it.
Appeal Strategy for Harrison County
The Indiana property tax appeal guide covers the statewide procedure. Harrison County considerations:
- Form 130 is filed with the Harrison County Assessor's Office in Corydon
- Comparable sales must come from within the same neighborhood code
- Cross-state Louisville-area sales are not admissible comparables — only Indiana-side sales carry weight
- For agricultural land, the DLGF base-rate methodology applies rather than open-market comparables
- For karst-affected parcels, influence factors should reflect the constraints
Harrison County By the Numbers
| Metric | Harrison County |
|---|---|
| County seat | Corydon (Indiana's first state capital) |
| Approximate parcel count | ~25,000 |
| Major river | Ohio River |
| Townships | 13 |
| Form 11 mailing | Mid-April 2026 |
| Appeal deadline | June 15, 2026 |
| Spring installment due | May 11, 2026 |
| Fall installment due | November 10, 2026 |
The Southern Indiana Context
Harrison County sits in a band of southern Indiana counties along the Ohio River that includes Crawford County immediately to the west, Floyd County to the east, and Washington County to the north. These counties share:
- Significant farmland acreage relative to total parcels
- Ohio River corridor influence on land valuations
- Karst topography in places
- Mixed Louisville-metro and purely-rural residential dynamics
For investors evaluating Harrison County rental property, the underwriting question is whether to position for Louisville-commuter demand in the eastern townships, for tourism-related demand in Corydon (driven by the historic district and nearby caves), or for purely-local residential demand elsewhere in the county.
Filing Logistics
Harrison County's Assessor's Office is at 245 Atwood St NE, Suite 221, Corydon, IN 47112, phone 812-738-4280. Form 130 appeals can be filed in person or by certified mail with return receipt. Online filing through the county's portal is also available and time-stamps on submission.
Property Lookup shows your AV alongside neighborhood-coded comparable sales for Harrison County, and Tax Appeal Automation builds the Form 130 evidence package on contingency.
When to Engage
For Harrison County, the optimal filing window is between mid-April (when Form 11 notices arrive) and late May. PTABOA caseload tends to spike in the final two weeks before June 15.
For karst-affected or flood-plain-affected parcels, the technical work of documenting the influence factors benefits from early engagement. Karst documentation may require Indiana Geological Survey reference data, and flood plain documentation requires FEMA flood map references.
If your 2026 AV moved more than 10% above the comparable sale evidence in your neighborhood code, the appeal calculus probably favors filing.
Find Your Harrison County Property
- Harrison County overview
- Harrison residential parcel data
- Harrison commercial parcel data
- Harrison agricultural parcel data