Morgan County is the south-side counterpart to Hamilton County — an Indianapolis-adjacent county whose residential market is shaped by commuter access to the metro and whose 2026 Form 11 Notices of Assessment reflect both that commuter dynamic and the statewide DLGF cost-table reset that pushed AVs up across all 92 Indiana counties. Martinsville, the county seat, anchors the SR-37 / I-69 corridor running south from Indianapolis through Bloomington; Mooresville, on the northern edge of the county, has absorbed steady residential growth from southwestern Marion County for two decades.
The 2026 cycle is also the first full year in which the I-69 Section 6 conversion of SR-37 to interstate-grade highway is reshaping commute patterns from Martinsville to Indianapolis — a structural change that affects market values in the long run more than any single annual trending adjustment.
Morgan County 2026 calendar: Form 11 notices typically mail by April 30, 2026. Appeal deadline is June 15, 2026. File a Form 130 with the Morgan County Assessor's Office in the Morgan County Administration Building in Martinsville.
The I-69 Effect on Martinsville
The State Road 37 corridor between Martinsville and Indianapolis was upgraded to I-69 interstate standards over the past several years, with full conversion completed in this decade. That structural change has pulled Martinsville closer — in commute time and in market perception — to the Indianapolis metro than at any point in its history.
The implications for 2026 assessments:
- Sale prices in Martinsville reflect commuter demand. Buyers who would have looked exclusively at Greenwood or Bargersville now consider Martinsville. Sale-trending captures that shift.
- Land-side AV in Martinsville's commuter-friendly neighborhoods has moved up faster than improvement-only AV.
- Parcels along the I-69 access points have seen the most pronounced upward movement.
This does not mean every Martinsville parcel saw an outsized increase. Properties farther from I-69 access — particularly in the western and southern parts of Morgan County — track more closely to traditional rural Indiana trending patterns.
Mooresville and Northern Morgan County
Mooresville sits on the northern edge of Morgan County, directly south of southwestern Marion County. The town has functioned as an Indianapolis suburb for decades, and its 2026 Form 11 dynamics resemble those of nearby Hendricks County communities like Plainfield more than the rural southern parts of Morgan.
Mooresville's median home values run higher than Martinsville's, and effective tax rates differ accordingly. Verify the township and school corporation on your Form 11 — Mooresville parcels can fall into either Brown Township (Morgan County) or, just over the line, into Marion County's Decatur Township, with very different tax outcomes.
What Drives Morgan County's 2026 Assessment Movement
Three forces shape the 2026 Form 11 in Morgan County:
1. Statewide DLGF Cost-Table Reset
The DLGF removed a downward base-cost adjustment that had been suppressing improvement values across Indiana for several cycles. Morgan County's mix of older and newer housing stock saw meaningful improvement-side adjustments.
2. Annual Sale Trending
The trending window the assessor uses captured the steady appreciation of the Indianapolis-metro housing market through early 2025. That appreciation flows into the annual trending adjustment the DLGF requires.
3. I-69 Commuter Premium
The structural shift in commute access from Martinsville to Indianapolis is reflected in sale prices, which the assessor uses for trending. This premium is concentrated in commuter-accessible neighborhoods and does not apply uniformly across the county.
What to Check on Your Morgan County Form 11
The general Form 11 walkthrough applies. Morgan-specific items:
Township Assignment
Morgan County is divided into fourteen townships including Adams, Ashland, Baker, Brown, Clay, Gregg, Harrison, Jackson, Jefferson, Madison, Monroe, Ray, Washington, and Green. A property near a township boundary should have its township coding verified.
School Corporation
Morgan County is served by several school corporations including Metropolitan School District of Martinsville, Mooresville Consolidated School Corporation, Eminence Community Schools, and Monroe-Gregg School District. Each has its own referendum history and tax rate.
Homestead Status
If you bought 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 Morgan County Auditor's Office before May 10.
I-69 Access Premium
For parcels that benefit directly from I-69 access, confirm the neighborhood code reflects the upgraded corridor. A neighborhood that was coded under the prior SR-37 designation may need recoding.
White River Floodplain
Portions of Morgan County along the White 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.
Morgan County and SB 1
The SB 1 property tax reform package layers onto the 2026 cycle:
| SB 1 change | Morgan County impact |
|---|---|
| $300 homestead credit | Applies to all Morgan homesteads on spring 2026 bills |
| Supplemental deduction 35% to 40% | Reduces taxable AV on homesteads |
| Business personal property exemption to $1M | Helps small Martinsville and Mooresville commercial owners |
| Rental/farmland 2% deduction starts at 13.3% | Helps Morgan County farmland owners and rental investors |
For Morgan County's farmland owners — meaningful in the western and southern parts of the county — the new 2% farmland deduction is part of a broader farmland tax picture that includes ongoing pressure from the DLGF base-rate adjustments.
Appeal Strategy for Morgan County
Morgan County Form 130 filing: filed with the Morgan County Assessor's Office at the Administration Building in Martinsville. Include 3 to 5 comparable sales within the same neighborhood code, photos documenting any condition issues, and your own market-value opinion.
The Indiana property tax appeal guide covers the statewide procedure. Morgan County considerations:
- Form 130 is filed with the County Assessor in Martinsville
- PTABOA hearings are typically scheduled 3 to 6 months after filing
- Comparable sales must come from within the same neighborhood code
- For agricultural land, the DLGF base-rate methodology applies rather than open-market comparable sales
Morgan County's effective tax rates vary by community and taxing district. At Martinsville's median rate, every $10,000 of AV reduction translates to roughly $90 to $110 of annual tax savings, depending on the specific taxing district.
Morgan County By the Numbers
| Metric | Morgan County |
|---|---|
| County seat | Martinsville |
| Largest northern suburb | Mooresville |
| Approximate parcel count | ~35,000 |
| Major school corporations | 4 (Martinsville, Mooresville, Eminence, Monroe-Gregg) |
| Townships | 14 |
| Form 11 mailing | By April 30, 2026 |
| Appeal deadline | June 15, 2026 |
| Spring installment due | May 11, 2026 |
Morgan County and the Indianapolis-Bloomington Corridor
Morgan County sits on the I-69 corridor between Indianapolis and Bloomington — a corridor that includes Marion County to the north, Morgan County in the middle, and Monroe County (Bloomington and Indiana University) to the south. The 2026 cycle is the first in which Morgan County's market is being shaped by both ends of that corridor at once.
For investors evaluating Morgan County rental property, the underwriting question is whether to position for Indianapolis-commuter demand in the north (Mooresville and northern Martinsville), Bloomington-adjacent demand in the south, or local Martinsville demand for properties not directly tied to either corridor.
Filing Logistics
Morgan County's Assessor's Office is in the Morgan County Administration Building in Martinsville. Form 130 can be filed in person or by certified mail with return receipt. Online filing through the county's portal time-stamps on submission and is the safest option in the final week before June 15.
Property Lookup shows your AV alongside neighborhood-coded comparable sales, and Tax Appeal Automation builds the Form 130 evidence package on contingency.
When to Engage
The optimal Morgan County filing window is between mid-May and May 25. PTABOA caseload tends to spike in the final two weeks before June 15, and assessor staff have less time for informal resolutions during the deadline rush. 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 Morgan County Property
- Morgan County overview
- Morgan residential parcel data
- Morgan commercial parcel data
- Morgan agricultural parcel data