US Land Life

Montana

Buying Land in Custer County, Montana

Custer County, anchored by Miles City in southeastern Montana, runs on ranching and a genuine agricultural research legacy at Fort Keogh. A buyer here should know the unincorporated county actually has real, mapped zoning -- Agricultural and Residential districts under a 2016 resolution -- and that much of the county's residential land already sits inside one of more than 120 existing platted subdivisions rather than being raw, unsplit acreage.

Real Countywide Zoning for the Unincorporated County

Generally favorable

Custer County adopted Zoning Regulations under Resolution #2016-31, applying to the unincorporated part of the county (Miles City runs its own separate municipal zoning). The code establishes an Agricultural District intended to protect ongoing agricultural operations and a Residential District for low-density residential use, with agriculture and residential uses generally allowed in every district and other uses more restricted. This is a genuine, mapped zoning system -- confirm the specific district for a parcel and its permitted-use table directly with the county's Land Use office.

Most Residential/Vacant Land Is Already Platted

Case-by-case / verify locally

County zoning documentation notes that the majority of residential and vacant land in Custer County sits within more than 120 existing platted subdivisions. That means a lot of available parcels come with pre-existing plat, easement, and possibly covenant history rather than being freshly-created raw acreage -- pull the specific subdivision's plat and any recorded covenants before assuming a lot's use is unrestricted beyond the county zoning district itself.

Fort Keogh: Federal Research Land, Not Available for Purchase

Could not confirm

Just west of Miles City, the historic Fort Keogh military post (established 1876) has operated since 1924 as a roughly 55,000-acre USDA Agricultural Research Service livestock and range research station, run jointly with Montana State University. It's a real, notable part of the county's agricultural identity and research infrastructure, but it's federal/university land, not private acreage on the market -- don't assume proximity to Fort Keogh implies anything about a specific private parcel's zoning, access, or grazing rights without confirming directly.

A Real, Working Ranching Economy

Generally favorable

Roughly 75% of private land in Custer County is devoted to agriculture, and the sector is a documented, substantial contributor to the county economy. This is genuine working ranchland, not a rural-lifestyle veneer -- expect real production history, grazing leases, and water infrastructure questions to matter more than they would in a purely recreational-land market.

A real zoning code for the unincorporated county -- and a lot of already-platted land

Custer County is a genuine exception to the pattern the state hub describes, where a minority of Montana's 56 counties have adopted countywide zoning. Under Zoning Regulations adopted by Resolution #2016-31, the unincorporated county (everything outside Miles City, which administers its own separate municipal zoning, building inspection, and permitting) is divided into zoning districts including an Agricultural District, intended to maintain and protect ongoing agricultural operations, and a Residential District for lower-density residential use. Agricultural and residential uses are broadly allowed across districts, while other use types are more restricted -- confirm the applicable district and its specific use table with the county before assuming a given use is permitted.

A related fact worth knowing: the county's own zoning documentation notes that the majority of Custer County's residential and vacant land already sits inside one of more than 120 platted subdivisions. In practice, that means a large share of the parcels you'll actually find for sale in the county aren't raw, never-divided acreage -- they're lots inside an existing plat, which can carry its own recorded easements, access arrangements, or covenants layered on top of the county zoning district. Get the specific subdivision's plat and any covenants from the Clerk & Recorder before assuming a lot behaves like unrestricted rural acreage.

Fort Keogh: from a 19th-century cavalry post to a federal range-research station

Fort Keogh, established in July 1876 in the aftermath of the Battle of the Little Bighorn and named for Captain Myles Keogh, sits just west of Miles City and is directly tied to the origin of the city's name (for General Nelson A. Miles, who directed the fort's founding). After decades as an Army post and later a horse remount station, the War Department transferred the site to the Department of Agriculture in 1924, and it has operated ever since as a livestock and rangeland research facility -- today a roughly 55,000-acre USDA Agricultural Research Service station run in cooperation with the Montana Agricultural Experiment Station and Montana State University, focused on cattle genetics, nutrition, and rangeland management research relevant to the whole Northern Plains.

For a land buyer, the practical point is straightforward: Fort Keogh is real, significant, federally- and university-operated research land, not a source of private parcels for sale, and its presence doesn't automatically confer any particular status on nearby private ranchland. It is, however, a genuine sign of how central rangeland ranching research and history are to this county's identity -- worth knowing as context, not as something that changes the zoning or access analysis for a specific private parcel elsewhere in the county.

A real ranching economy behind the numbers

Roughly 75% of private land in Custer County is devoted to agriculture, and the sector remains a substantial share of the local economy -- county-level USDA and MSU Extension figures put farm and ranch value-added in the tens of millions of dollars annually, with a documented multiplier effect on other local jobs. That's the honest baseline for evaluating agricultural or ranch land here: production history, grazing capacity, and existing lease arrangements will matter more to a parcel's real value than acreage and list price alone. Ask for actual carrying-capacity and production data, not just total acres, before valuing a working ranch parcel. That working-ranch economy also supports real, state-permitted feedlot operations near Miles City and Kinsey -- see this page's livestock-feedlots guide for the state and county rules that apply.

Who to Call Before Buying Land in Custer County

Miles City runs its own separate municipal planning, zoning, and building-permit process, not listed here since this page covers the unincorporated county. Custer County's Land Use and Environmental Health functions share a single office and phone line. Property valuation is a state Department of Revenue function statewide in Montana (not unique to Custer County); the county Treasurer, a separate office, handles tax billing and collection. Fort Keogh is federal/university research land administered by USDA-ARS and Montana State University, not a county office -- it is not a point of contact for private land questions.

Planning & Zoning

Custer County Land Use Department

Confirming a parcel's zoning district (Agricultural or Residential) under Resolution #2016-31, conditional use and variance questions, subdivision review, and floodplain permits for the unincorporated county.

Phone: (406) 366-1424Official website →

Septic / Onsite Wastewater

Custer County Environmental Health

Septic (on-site wastewater) permitting and DEQ liaison questions. This office is combined with the Land Use/zoning function at the same contact number.

Phone: (406) 366-1424Official website →

GIS / Parcel Records

Custer County GIS

Pulling a specific parcel's boundaries, zoning district, and ownership records.

Phone: (406) 874-4024Official website →

Assessor / Property Tax

Montana Department of Revenue -- Property Assessment Division

Property valuation questions; ask to be directed to the Miles City field office serving Custer County. In Montana, property assessment is a state Department of Revenue function, not a county assessor's office.

Phone: (406) 444-6900Official website →

Assessor / Property Tax

Custer County Treasurer

Property tax bills, payment, and due-date questions for a specific parcel.

Phone: (406) 874-3427Official website →

Recorder / Clerk / Land Records

Custer County Clerk and Recorder

Recorded deed, easement, and plat history for a specific parcel, including a platted subdivision's recorded covenants.

Phone: (406) 874-3343Official website →

Agricultural Extension

MSU Extension -- Custer County

Local ranching, rangeland-management, and agronomy guidance.

Phone: (406) 874-3370Official website →

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Topics Specific to Custer County

Livestock Feedlots in Custer County: Rules & Permits →

Sources

  1. Custer County Zoning Regulations, Resolution #2016-31 — Custer County, Montana Government (accessed 2026-09)
  2. Custer County Subdivision Regulations — Custer County, Montana Government (accessed 2026-09)
  3. Land Use — Custer County, Montana Government (accessed 2026-09)
  4. Environmental Health — Custer County, Montana Government (accessed 2026-09)
  5. Ft. Keogh Livestock Range & Research Laboratory — Miles City Area Chamber of Commerce (accessed 2026-09)
  6. Fort Keogh, Miles City, Montana -- A Historical Legacy — Western Ag Reporter (accessed 2026-09)
  7. Fort Keogh Livestock and Range Research Laboratory — USDA Agricultural Research Service (accessed 2026-09)
  8. Custer County, MT | Data USA — Data USA (U.S. Census Bureau / BEA data) (accessed 2026-09)
  9. Custer COP 2024 (Local Area Profile) — Montana Department of Labor and Industry (accessed 2026-09)
  10. Custer County Extension — Montana State University Extension (accessed 2026-09)
  11. Field Office Locations — Montana Department of Revenue (accessed 2026-09)

Last reviewed 2026-09