County Maps US

Jefferson County, Oregon

A county in Oregon, ranked 25 of 36 by population.

CountyFIPS 41031

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

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Population
25,740
+1,158 (+4.7%) since 2020
Land area
1,782
square miles. A further 0.6% of the total area is water
Population density
14.4
people per square mile, computed rather than published
County seat
Madras
Seat of county government.
Established
1914
111 years ago
Largest city
Madras city
Population 7,829.

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; Wikidata (CC0), Wikidata. Retrieved 30 August 2026.

Satellite view

Aerial imagery of Jefferson 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 Jefferson 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 800 by 384 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 Jefferson 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.

MeasureValueIn OregonNationally
Population25,74025th of 361,597th of 3,144
Land area1,782 sq mi19th of 36333rd of 3,144
Population density14.4 per sq mi21st of 362,413th of 3,144
Median household income$76,26013th of 36762nd of 3,143

Full data for Jefferson County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population25,740Vintage 2025 Population Estimates
Population in 202024,582Vintage 2025 Population Estimates
2020 estimates base?24,515Vintage 2025 Population Estimates
Land area1,782 sq mi2025 Gazetteer Files
Water area10.1 sq mi2025 Gazetteer Files
Total area1,792 sq mi2025 Gazetteer Files
Population density?14.4 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$76,260American Community Survey 2020-2024 5-Year Estimates
Median home value$374,200American Community Survey 2020-2024 5-Year Estimates
Median age41.5American Community Survey 2020-2024 5-Year Estimates
Households8,814American Community Survey 2020-2024 5-Year Estimates
Housing units10,602American 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
-23
271 births, 294 deaths
Net migration
+77
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 6 areas bordering Jefferson 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 areaStateShared borderPopulation
Wasco CountyOregon68 mi26,310
Crook CountyOregon48 mi27,564
Deschutes CountyOregon37 mi213,072
Linn CountyOregon24 mi132,843
Wheeler CountyOregon21 mi1,472
Marion CountyOregon19 mi355,777

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

All 36 counties of Oregon

Open the interactive Oregon county map, or jump straight to any of them.

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