US Land Life

Montana

Buying Land in Big Horn County, Montana

Big Horn County's defining fact for a land buyer isn't zoning -- it's that most of the county's land area lies inside the Crow Indian Reservation or the Northern Cheyenne Indian Reservation, where trust land and privately-owned fee land sit interspersed in a checkerboard pattern, and the county's own subdivision rules explicitly don't reach tribal land. Get the trust-or-fee status right before anything else.

Trust Land vs. Fee Land

Case-by-case / verify locally

Roughly two-thirds of Big Horn County falls within the boundaries of the Crow or Northern Cheyenne reservations. Within those boundaries, land is either tribal/individual trust land (held by the federal government, not sellable or mortgageable on the open market without BIA and often tribal approval) or fee land (privately owned outright, taxable, and generally transferable like land anywhere else). These parcels are frequently interspersed -- a 'for sale' fee parcel can sit adjacent to trust land with a completely different set of rules. Confirm a specific parcel's status with the county Clerk and Recorder and the BIA Crow Agency realty office before assuming either status.

County Subdivision Rules Don't Reach Tribal Land

Case-by-case / verify locally

Big Horn County's own Growth Policy states that county subdivision regulations apply to parcels recorded at the courthouse, not to tribal land or unrecorded parcels -- meaning a division of trust land doesn't go through the same county review as a division of fee land, even on adjacent ground. Unless the county and tribal governments have aligned their land-use policies for a given area, restrictions can differ from one parcel to its neighbor.

Zoning

Case-by-case / verify locally

As of the county's most recent published Growth Policy, there is no zoning in the Big Horn County planning area outside a wireless-communication-facilities ordinance. Combined with the trust/fee land-status question above, this means land-use certainty here depends more on confirming trust-vs-fee status and any tribal land-use rules than on a county zoning map.

Northern Cheyenne Reservation Land Concentration

Could not confirm

The Northern Cheyenne Reservation (whose western portion lies in Big Horn County) is unusually concentrated in tribal ownership -- by some accounts only around 2% of its land base is fee land, a much higher concentration of trust land than the more checkerboarded Crow Reservation. If you're looking at land near the Northern Cheyenne boundary specifically, don't assume the Crow Reservation's more mixed ownership pattern applies there too.

Trust land and fee land: the question that comes before zoning or subdivision review

About two million acres of the Crow Indian Reservation and roughly 445,000 acres of the Northern Cheyenne Indian Reservation lie within Big Horn County -- together covering roughly two-thirds of the county's total land area. Within reservation boundaries, land status splits into two fundamentally different categories: trust land, held by the federal government for a tribe or individual tribal members and generally exempt from property tax and not freely sellable, and fee land, privately owned outright and functioning like ordinary property. See the tribal-trust-land-status page below for how to actually verify which one applies to a specific parcel, and what that means for financing and closing.

The Crow Reservation in particular has a well-documented checkerboard pattern, with deeded (fee) parcels interspersed among trust land -- a legacy of early-20th-century federal allotment policy. One federal-era figure put allotted trust land at 57% of the Crow Reservation's roughly 2.28 million acres as of 1961; that figure is decades old and should not be treated as current, but it illustrates that a meaningful, geographically scattered share of reservation land here is trust land, not fee land available for ordinary purchase. Before making an offer on any parcel inside the reservation boundaries, confirm its status directly -- a real estate listing describing acreage 'within the Crow Reservation' does not by itself tell you whether that specific parcel is fee or trust.

County subdivision and zoning rules stop at the edge of recorded, non-tribal land

Big Horn County's Growth Policy is direct about a limitation that a buyer needs to internalize: the county's subdivision regulations generally apply to parcels recorded at the courthouse, but not to tribal lands or parcels that aren't recorded there. In practice, this means the standard state-level Subdivision and Platting Act / Sanitation in Subdivisions Act framework described on the state hub -- DEQ sanitation review, the 20-acre subdivision threshold, family-transfer exemptions -- functions normally for fee land divisions, but doesn't have the same footing for a division of tribal trust land, which instead runs through tribal and BIA processes. The county's own planning documents note that unless the county and tribal governments align their land-use policies, it's entirely possible for meaningfully different rules to apply to two adjoining parcels depending on their status.

Zoning compounds this: as of the county's most recent published Growth Policy, there is no zoning in the Big Horn County planning area outside of a wireless-communication-facilities ordinance. So a buyer here isn't choosing between 'zoned' and 'unzoned' fee land the way a buyer in a fully off-reservation Montana county might -- the more consequential question is which land-status and jurisdictional framework (county, tribal, or BIA-administered) actually governs a given parcel, and that has to be confirmed parcel-by-parcel rather than assumed from the county's general planning documents.

Who to Call Before Buying Land in Big Horn County

Big Horn County does not appear to have a standalone planning/zoning department distinct from its general Growth Policy administration -- planning-related questions and subdivision review for fee land are handled through the county government generally (start with the Clerk & Recorder or the Commissioners' office at the Big Horn County Courthouse in Hardin). For any parcel inside the Crow or Northern Cheyenne reservation boundaries, the BIA Crow Agency office, the Crow Tribe's or Northern Cheyenne Tribe's own land office, and (for Northern Cheyenne land) the BIA's Northern Cheyenne Agency are the authorities that actually govern trust-land status and transactions -- the county cannot answer those questions on its own.

Other

Bureau of Indian Affairs -- Crow Agency (Rocky Mountain Regional Office)

Confirming trust-vs-fee status of a parcel within the Crow Reservation, and the approval process for any transaction involving trust land or allotments.

Phone: (406) 638-2672Email: IA_Crow_Agency@bia.govOfficial website →

GIS / Parcel Records

Big Horn County Clerk & Recorder

Recorded deeds, certificates of survey, and plat history for fee (non-trust) parcels; a starting point for confirming whether a parcel is recorded at the county level at all.

Phone: (406) 665-9730Official website →

Environmental Health

Big Horn County Public Health Department -- Environmental Health / Sanitarian

Septic permitting, site evaluations, and environmental-health matters for fee land within the county (tribal trust land septic approval may instead route through Indian Health Service or tribal environmental programs -- confirm which applies to a specific parcel).

Phone: (406) 665-8720Official website →

Assessor / Property Tax

Montana Department of Revenue -- Big Horn County Field Office

Property appraisal and assessed-value questions for taxable (fee) parcels. Trust land is generally exempt from this process entirely.

Phone: (406) 665-9730Official website →

Want to know if this specific parcel actually works?

Tell us what you're looking at and we'll connect you with a local land specialist who can help you sanity-check it before you go further.

Get local guidance

Topics Specific to Big Horn County

Tribal Trust Land Status in Big Horn County →Hunting Land in Big Horn County →

Sources

  1. Big Horn County, Crow Reservation and Northern Cheyenne Reservation — Montana State University Extension (accessed 2026-09)
  2. Big Horn County Growth Policy Update, May 1, 2014 (subdivision regulations and tribal-land scope) — Big Horn County, Montana Government (accessed 2026-09)
  3. Policy Basics: Land Status of Indian Country — Montana Budget & Policy Center (accessed 2026-09)
  4. Crow Reservation and Off-Reservation Trust Land, MT -- Census Bureau Profile — U.S. Census Bureau (accessed 2026-09)
  5. Fee to Trust Land Acquisitions — Bureau of Indian Affairs (accessed 2026-09)
  6. Crow Agency — Bureau of Indian Affairs, Rocky Mountain Region (accessed 2026-09)
  7. Contact the Rocky Mountain Regional Office — Bureau of Indian Affairs, Rocky Mountain Region (accessed 2026-09)
  8. Fact Sheet 3 -- Inheriting Indian Land — Montana State University (accessed 2026-09)
  9. Clerk & Recorder — Big Horn County, Montana Government (accessed 2026-09)
  10. Environmental Health — Big Horn County Public Health Department (accessed 2026-09)

Last reviewed 2026-09