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Buying land in McClain County, Oklahoma: what to check

McClain County covers 571 square miles of land and 10 of water in Oklahoma, with about 48,434 residents in 2024 (up 16.3% since 2020). The 2020 Census counted 99% of its land as rural and 13% of residents as living in urban areas. Farms operate 65% of the county's land. Below: how much of McClain County floods, what its soils allow, what farmland is worth and how often it's in drought, from free public data with every source linked.

Check a location in McClain CountySee a sample report

McClain County at a glance

In the 100-year floodplain

11%

Above the state's county median (4.8%)

FEMA National Risk Index

Hydric (wetland-type) soils

under 1%

Below the state's county median (1%)

USDA NRCS Web Soil Survey (SSURGO)

Soils very limited for septic

72%

USDA NRCS Web Soil Survey (SSURGO)

Farm land value, 2022

$3,806/acre

Above the state's county median ($2,515)

USDA NASS, 2022 Census of Agriculture

Weeks in severe drought

34%

Share of weekly maps, 2021–2026

U.S. Drought Monitor county statistics

Land classed rural

99%

Census 2020 Census urban and rural classification

What to check before buying land in McClain County

Ordered by what McClain County's numbers point to. Every parcel differs, so treat this as where to look first.

  1. 1.Budget for a perc test and maybe an engineered septic

    USDA rates 72% of McClain County's mapped soils "very limited" for conventional septic absorption fields and 0% "not limited".

    Without city sewer you need a septic permit from the county or state health department. Make the offer contingent on a passing soil or perc test; mound and aerobic systems can cost several times a conventional one.

    Guide: Perc tests and septic systems

  2. 2.Put flood checks first in McClain County

    11% of the county's area is in the 1%-annual-chance (100-year) floodplain FEMA's National Risk Index uses for inland flooding; 17% of its mapped soils flood occasionally or frequently.

    Look up the FEMA flood zone at the pin, not the parcel's address. If any of the land is in zone A or V, price flood insurance before you offer, ask for an elevation certificate, and check whether the access road floods too.

    Guide: Flood zones before buying land

  3. 3.Prove the water supply before you buy

    At least half of McClain County was in severe drought (D2) or worse in 34% of the 262 weekly U.S. Drought Monitor maps from 2021 to 2026. Oklahoma allocates water by permit or water right, so a well or pond isn't automatic.

    Ask whether the land has a public water connection, an existing well (and its log and yield), or neighbors' well depths from the state well database. For a new well, check permits and typical depth with the state agency first.

    Guide: Wells, public water and water rights

  4. 4.Confirm legal road access and power

    The 2020 Census classified 99% of McClain County's land area as rural.

    Rural tracts are often sold without recorded access or a power line nearby. Get the title company to confirm a recorded easement or public road frontage, and ask the electric co-op what a line extension costs.

    Guide: Road access and landlocked land

  5. 5.Check the soils if you plan to farm, graze or garden

    Farm real estate in McClain County averaged $3,806 an acre including buildings in the 2022 Census of Agriculture, and 37% of its mapped soils are prime or of statewide importance.

    Compare the asking price with recent sales of similar tracts, not the county average, which mixes cropland, pasture, timber and homesites. If an ag tax valuation applies, ask what the rollback taxes would be if you change the use.

    Guide: Land due diligence checklist

  6. 6.Rule out wetlands on the part you'll use

    About under 1% of McClain County's mapped soils are hydric (formed under saturated conditions, a federal wetland indicator) and 0% are poorly or very poorly drained (USDA SSURGO).

    Open the National Wetlands Inventory mapper at the parcel. Filling or draining a wetland can need a Clean Water Act Section 404 permit, and wet ground limits septic fields and building pads.

    Guide: Wetlands on land for sale

Flood zones, wetlands and water in McClain County

Area in the 1%-annual-chance (100-year) floodplain
11%, 12th highest of 77 in Oklahoma FEMA National Risk Index
Mapped soils that flood occasionally or frequently
17% USDA NRCS Web Soil Survey (SSURGO)
Hydric soils (a federal wetland indicator)
under 1% USDA NRCS Web Soil Survey (SSURGO)
Poorly or very poorly drained soils
0% USDA NRCS Web Soil Survey (SSURGO)
Surface water (lakes, rivers, reservoirs)
10 sq mi Census 2024 Gazetteer Files
Drought on 2026-10-27
87% moderate or worse, 73% severe or worse U.S. Drought Monitor county statistics

The floodplain share is the area FEMA's National Risk Index counts as exposed to inland flooding, mostly mapped 100-year flood zones. It says how common flood-prone land is in McClain County, not whether a given parcel floods. For that, look up the zone at your exact point on the FEMA Flood Map Service Center or run the free check.

Soils and terrain

Prime farmland
37% USDA NRCS Web Soil Survey (SSURGO)
Farmland of statewide importance
0% USDA NRCS Web Soil Survey (SSURGO)
Average slope over 15%
under 1% USDA NRCS Web Soil Survey (SSURGO)
Very limited for septic absorption fields
72% USDA NRCS Web Soil Survey (SSURGO)
Not limited for septic absorption fields
0% USDA NRCS Web Soil Survey (SSURGO)

Shares of McClain County's soil-surveyed land (about 364,275 acres, open water excluded), using each map unit's dominant condition in USDA's SSURGO soil survey. Soils change within a few hundred feet, so the soil at your building site is what matters.

Farms and land use

Farms (2022)
1,121 USDA NASS, 2022 Census of Agriculture
Share of the county's land in farms
65% USDA NASS, 2022 Census of Agriculture
Average farm size
211 acres (median 60) USDA NASS, 2022 Census of Agriculture
Average value of land and buildings
$3,806 per acre, 5th highest of 77 in Oklahoma USDA NASS, 2022 Census of Agriculture
Cropland
79,950 acres USDA NASS, 2022 Census of Agriculture
Pasture and rangeland
147,974 acres USDA NASS, 2022 Census of Agriculture
Woodland on farms
22,878 acres USDA NASS, 2022 Census of Agriculture
Irrigated land
2,254 acres USDA NASS, 2022 Census of Agriculture

Natural hazard ratings

FEMA's National Risk Index rates each hazard for McClain County relative to every other U.S. county. Overall risk: Relatively Low.

  • DroughtRelatively Moderate
  • HailRelatively Moderate
  • Heat waveRelatively Moderate
  • TornadoRelatively Moderate
  • Winter weatherRelatively Moderate
  • River and inland floodingRelatively Low
  • Strong windRelatively Low
  • WildfireRelatively Low
  • EarthquakeVery Low
  • HurricaneVery Low
  • LandslideVery Low
  • LightningVery Low

FEMA National Risk Index, December 2025

Questions about buying land in McClain County

How much of McClain County, OK is in a flood zone?

About 11% of McClain County's area is in the 1%-annual-chance (100-year) floodplain used by FEMA's National Risk Index (December 2025), 12th highest of 77 counties in Oklahoma. Whether a given parcel is in a flood zone depends on its exact location, so check the FEMA map at your pin.

How much does land cost per acre in McClain County?

The 2022 Census of Agriculture put the average value of farm land and buildings in McClain County at $3,806 an acre, 5th highest of 77 counties in Oklahoma (the median Oklahoma county was $2,515). It's a self-reported average across farms, so small homesites and recreational tracts often sell for more per acre.

Will a septic system work on land in McClain County?

Often, but test first. USDA soil surveys rate 72% of McClain County's mapped soils very limited for conventional septic absorption fields, usually because of wetness, slow permeability, shallow rock or flooding. A perc or soil test on the parcel decides what system the health department will permit.

Is there good farmland in McClain County?

37% of McClain County's mapped soils are prime farmland, 0% are prime only if drained, irrigated or protected from flooding, and 0% are farmland of statewide importance (USDA SSURGO). The 2022 Census of Agriculture counted 1,121 farms averaging 211 acres.

How often is McClain County in drought?

Since 2021, at least half of the county was in severe drought or worse in 34% of weekly U.S. Drought Monitor maps, and in extreme drought in 25%. On 2026-10-27, 87% of the county was in moderate drought or worse.

Can I check a specific property in McClain County?

Yes. Enter the address or drop a pin anywhere in McClain County on the free check. It shows which checks return data at that exact point, and the full report costs $29: flood zone, slope, soils, wetlands, roads, power lines, wildfire and more, each with its source. It is a screen of public maps, not a survey, title search or perc test.

Check the parcel, not just the county

County numbers tell you what to look for. The free check looks at your exact point in McClain County: flood zone, slope, soils, wetlands, roads, power and more. The full report is $29.

Check a location in McClain County

What these numbers can't tell you

  • County shares describe McClain County as a whole; a parcel can be entirely in or out of a flood zone, wetland or poor soil.
  • It doesn't look at the whole parcel, its boundaries, title, easements, zoning or permits.
  • It isn't a survey, appraisal, elevation certificate, soil or perc test, or Phase I environmental site assessment.
  • It can't see local distribution power lines, driveways, legal access, wells or mineral rights.
  • Maps lag behind the ground, and distances are straight-line, not driving distance.

Sources and vintages

Summarized per county by our build script on 2026-10-31. County figures cover the whole county; checks on the report are at your point.