Sherman County, Oregon

A county in Oregon, ranked 34 of 36 by population.

CountyFIPS 41055

Within Oregon

Sherman County, highlighted, with the areas around it. Boundaries generalised from the 2025 Census cartographic boundary file; neighbour fills carry no data. The dot marks Moro, the county seat, located via the 2025 Census Gazetteer.

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Population: 2,051; +171 (+9.1%) since 2020
Land area: 823.6; square miles. A further 0.9% of the total area is water
Population density: 2.5; people per square mile, computed rather than published
County seat: Moro; Seat of county government.
Established: 1889; 136 years ago
Largest city: Wasco city; Population 457.

Satellite view

Aerial imagery of Sherman County with its boundary drawn on top. A map shows you the shape; this shows you what is inside it, and which side of the line a place falls on.

Aerial view of Sherman County, Oregon from the USGS National Map, with its boundary outlined — Imagery: USGS National Map, USGS Imagery Only, public domain, requested from USGS by your browser when you reach this point on the page, at 602 by 800 pixels. The boundary is the 2025 Census cartographic boundary file, reprojected to Web Mercator to match the imagery. You can also open the USGS National Map viewer.

Where Sherman County ranks

Position among the 36 counties of Oregon, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

Measure	Value	In Oregon	Nationally
Population	2,051	34th of 36	3,039th of 3,144
Land area	823.6 sq mi	29th of 36	1,026th of 3,144
Population density	2.5 per sq mi	30th of 36	2,946th of 3,144
Median household income	$60,161	30th of 36	2,069th of 3,143

Full data for Sherman County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
Measure	Value	Source and vintage
Population	2,051	Vintage 2025 Population Estimates
Population in 2020	1,880	Vintage 2025 Population Estimates
2020 estimates base?	1,873	Vintage 2025 Population Estimates
Land area	823.6 sq mi	2025 Gazetteer Files
Water area	7.6 sq mi	2025 Gazetteer Files
Total area	831.2 sq mi	2025 Gazetteer Files
Population density?	2.5 per sq mi	Computed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income	$60,161	American Community Survey 2020-2024 5-Year Estimates
Median home value	$211,800	American Community Survey 2020-2024 5-Year Estimates
Median age	44.7	American Community Survey 2020-2024 5-Year Estimates
Households	804	American Community Survey 2020-2024 5-Year Estimates
Housing units	969	American Community Survey 2020-2024 5-Year Estimates

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; US Census Bureau, American Community Survey, American Community Survey 2020-2024 5-Year Estimates, released 29 January 2026. Population density is computed here, not published: it divides the Vintage 2025 population estimate by the 2025 Gazetteer land area, which are two different Census products. Retrieved 30 August 2026.

How the population changed

The Census Bureau publishes the components behind an estimate, not just the total. For the year to July 2025:

Births minus deaths: 0; 23 births, 23 deaths
Net migration: +36; More people moved in than moved out.

Source: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026. Retrieved 30 August 2026.

The 3 areas bordering Sherman County

Ordered by the length of the border actually shared, which the Census Bureau publishes in its county adjacency file and which no other county reference presents.

Bordering area	State	Shared border	Population
Gilliam County	Oregon	95 mi	1,971
Wasco County	Oregon	84 mi	26,310
Klickitat County	Washington	15 mi	24,331

Source: US Census Bureau, County Adjacency File, 2025 County Adjacency File, released 15 September 2025. Retrieved 30 August 2026.

Data on this page last rebuilt 30 August 2026. How these figures are produced.