Montana
Buying Land in Fergus County, Montana
Fergus County, seat Lewistown, is central Montana's agricultural heartland -- more than three-quarters of its land is classified as farmland -- and it runs its own planning and environmental health offices rather than sharing them with neighboring counties, a detail that affects who you actually call with questions.
An agricultural county at scale -- and one where farms are consolidating
Fergus County was built on agriculture and still runs on it: more than 78% of the county's land is classified as farmland, generating approximately $149 million in annual cash receipts from livestock and crops, with winter and spring wheat, barley, and hay as the major crops alongside a substantial cattle-ranching sector (roughly 68,000 beef cows and heifers calved in a recent reporting year). Agricultural production employs roughly a quarter of the county's labor force and, per USDA figures, generated tens of millions of dollars in value-added economic activity, representing a meaningful share of the county's total GDP.
A specific, documented trend worth knowing if you're evaluating agricultural land here: average farm size in Fergus County increased from 2,149 acres in 2017 to 2,374 acres in 2022, according to USDA Census of Agriculture figures, alongside a more than doubling of average net cash farm income over the same period. That points to real consolidation pressure -- larger operations acquiring or leasing additional acreage -- which can affect both the market for smaller parcels and expectations around what acreage is considered a viable standalone operation locally. If a smaller tract's marketing emphasizes its agricultural potential, ask what scale of operation is realistic on that specific acreage given current local farm economics, rather than assuming a smaller historical norm still holds.
Two planning offices, not one -- Fergus County and the City of Lewistown
Fergus County maintains its own Planning Office, separate from the City of Lewistown's Planning Department. The county office (712 W. Main Street, Suite 101, Lewistown) handles land-use issues for unincorporated county land -- including land divisions of 160 acres or less, family-transfer exemptions, and boundary retracements -- reviewed under the Montana Subdivision and Platting Act and the county's own Subdivision Regulations. The City of Lewistown's Planning Department, by contrast, administers zoning not just inside city limits but in a roughly two-mile area surrounding the city (sometimes called extraterritorial or "doughnut" zoning), and has recently been working through a "pre-zoning" process for areas adjacent to the city under the 2023 Montana Land Use Planning Act.
The practical implication: which office you need depends on exactly where a parcel sits. Land well outside Lewistown's zone of influence is a county Planning Office matter; land within roughly two miles of city limits may fall under Lewistown's extraterritorial zoning even though it's unincorporated. Confirm which office has jurisdiction over your specific parcel before relying on either one's general guidance.
Environmental health: Fergus runs its own office, unlike some neighbors
Where several central Montana counties (Golden Valley, Judith Basin, Musselshell, Petroleum, and Wheatland) share sanitarian and environmental health services through the multi-county Central Montana Health District, Fergus County withdrew from that arrangement and runs its own environmental health office, based at the same 712 W. Main Street location as the Planning Office. That office handles septic permitting directly, including mandatory site evaluations for new systems and set permit fees (with a documented lower fee for systems installed by a certified installer versus an uncertified one).
A real, recent example of the county's active environmental review process: in early 2025, Montana DEQ published a draft environmental assessment for a proposed septage (pumped septic waste) land-application site on private agricultural land in Fergus County, with a standard 30-day public comment period. This kind of state-level review applies to specific land-use proposals as they arise -- it's a useful illustration that land use decisions here go through documented process, but it doesn't mean every parcel or every use triggers this level of review. Ask the county Planning Office or DEQ directly about any pending or historical environmental review tied to a specific parcel you're considering.
Who to Call Before Buying Land in Fergus County
Land inside Lewistown city limits or its roughly two-mile extraterritorial planning area should be directed to the City of Lewistown Planning Department (406-535-1760), not the county Planning Office listed above -- confirm jurisdiction first. Property assessment in Fergus County is a Montana Department of Revenue field-office function rather than an elected county assessor, consistent with how it works statewide, but no assessor category is listed above: a phone number surfaced in search results ((406) 896-4000) also appeared, unchanged, for a different Montana county's assessor in this same research pass, so it could not be trusted as Fergus-specific and is omitted rather than published incorrectly.
Planning & Zoning
Fergus County Planning Office
Confirming zoning and land-use status for unincorporated county parcels, including whether a parcel falls within the City of Lewistown's extraterritorial planning area.
Subdivision & Land Development
Fergus County Planning Office
Land divisions of 160 acres or less, family-transfer exemptions, and parcel retracements under the Montana Subdivision and Platting Act and county Subdivision Regulations.
Septic / Onsite Wastewater
Fergus County Health Department -- Environmental Health
Septic system permitting (site evaluation, permit fees, certified-installer requirements) for county land.
Recorder / Clerk / Land Records
Fergus County Clerk & Recorder
Recorded deeds, easements, and plat history for a specific parcel.
GIS / Parcel Records
Montana State Library Cadastral Mapping Tool
Pulling a specific Fergus County parcel's boundaries, ownership, and assessment record.
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Get local guidanceTopics Specific to Fergus County
Sources
- Fergus County - Planning Office — Fergus County, Montana Government (accessed 2026-09)
- Fergus County - Health Department - Environmental Health — Fergus County, Montana Government (accessed 2026-09)
- Central Montana Health District running smoothly — Lewistown News-Argus (accessed 2026-09)
- Central Montana Health District - Environmental Health — Central Montana Health District (accessed 2026-09)
- DEQ issues draft Environmental Assessment for proposed septage land application site in Fergus County — Lewistown News-Argus (accessed 2026-09)
- City of Lewistown, Montana - Planning Department — City of Lewistown, Montana Government (accessed 2026-09)
- Lewistown considers joining new planning statutes — Lewistown News-Argus (accessed 2026-09)
- Fergus County - MSU Extension About — Montana State University Extension (accessed 2026-09)
- Central Montana farms get bigger as producers get older — Lewistown News-Argus (accessed 2026-09)
- Fergus County, Montana - Clerk & Recorder — Fergus County, Montana Government (accessed 2026-09)
Last reviewed 2026-09