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Roger Mills County, Oklahoma
USDA's soil survey flags shrink-swell clay on under 1% of Roger Mills County's mapped land and a shallow water table under basements on 1%, both below the national shares of 15% and 29%. 100% of the county is in drought on the October 13, 2026 Drought Monitor map.
FEMA's flood data list no flood losses here since 2016. 60% of homes were built before 1980, against 50% nationally; the median home dates from 1974.
Data as of October 13, 2026 · sources
expansive clay: shrink-swell limits slab homes
high water table: limits basements
in drought, October 13, 2026
of homes built before 1980
Soil under Roger Mills County
| Expansive clay (limits slab homes) | under 0.1% |
| High water table (limits basements) | 1.1% |
| Septic fields very limited | 81.0% |
| Clay swell (LEP, by area) | 1.7% |
| High-swell land (LEP 6%+) | under 0.1% |
| Mapped soil | 733,395 acres |
| Soil series | Share here | Series nationally: expansive clay |
|---|---|---|
| Quinlan | 21% | n/a |
| Nobscot | 14% | n/a |
| Woodward | 13% | n/a |
| Grandfield | 6% | n/a |
| Delwin | 4% | n/a |
| Vici | 3% | n/a |
How we count · survey areas OK129 (2025-08-29)
What the numbers mean here
Rain over the 12 months to August 2026: 13.94 in, 11.24 in below the 1991-2020 average year of 25.18 in.
USDA rates 81% of the land very limited for septic absorption fields.
With shrink-swell clay on under 1% and a shallow water table on 1% of the land, the soil survey points to neither problem across most of Roger Mills County; conditions still vary lot by lot.
Drought
100% of the county is in drought (D1 or worse) on the October 13, 2026 map. Part of the county was in drought in 49 of the last 52 weeks; the most was 100% of its area, in 34 weeks, most recently on the October 13, 2026 map.
| Category, October 13, 2026 | Share of county |
|---|---|
| D0 abnormally dry or worse | 100% |
| D1 moderate drought or worse | 100% |
| D2 severe or worse | 100% |
| D3 extreme or worse | 100% |
| D4 exceptional | 74.7% |
Flood losses since 2016
FEMA's flood data list no flood losses in Roger Mills County since 2016.
Rain
| Average year, 1991-2020 | 25.18 in |
| 12 months to August 2026 | 13.94 in (-11.24) |
| 2025 | 27.65 in (+2.47) |
| Wettest year since 1895 | 1923: 43.30 in |
| Driest year since 1895 | 1910: 11.98 in |
| Days with 1 inch or more, normal at LEEDEY (25 mi away) | 7.3 |
Homes
| Housing units | 1,847 |
| Median year built | 1974 |
| Built before 1980 | 60% |
| Built 2000 or later | 19% |
| Owner-occupied | 83% |
| Median value, owner-occupied | $157,800 |
| Single-family detached | 82% |
What repairs cost
Published ranges from cost guides, not quotes. More sources, and where they disagree.
Nearby counties
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Beckham County, OK | 30 mi | 3% | 2% |
| Hemphill County, TX | 31 mi | 2% | 4% |
| Ellis County, OK | 36 mi | 3% | 4% |
| Wheeler County, TX | 36 mi | 1% | 2% |
| Custer County, OK | 42 mi | under 1% | 1% |
| Dewey County, OK | 45 mi | 1% | 2% |
| Lipscomb County, TX | 49 mi | 7% | 1% |
| Washita County, OK | 51 mi | 1% | 1% |
Sources: USDA SSURGO (August 29, 2025) · US Drought Monitor (October 13, 2026) · FEMA NFIP v3 (September 9, 2026) · NOAA (August 2026) · Census ACS 2020-2024. Methods · Data status