County Maps US

Sac County, Iowa

A county in Iowa, ranked 77 of 99 by population.

CountyFIPS 19161

Within Iowa
Sac County, highlighted, with the areas around it. Boundaries generalised from the 2025 Census cartographic boundary file; neighbour fills carry no data.

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Population
9,525
-266 (-2.7%) since 2020
Land area
575
square miles. A further 0.6% of the total area is water
Population density
16.6
people per square mile, computed rather than published
County seat
Sac City
Seat of county government.
Established
1851
174 years ago
Largest city
Sac City city
Population 1,993.

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 Sac 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 Sac County, Iowa 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 726 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 Sac County ranks

Position among the 99 counties of Iowa, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

MeasureValueIn IowaNationally
Population9,52577th of 992,446th of 3,144
Land area575 sq mi38th of 991,728th of 3,144
Population density16.6 per sq mi83rd of 992,347th of 3,144
Median household income$73,83831st of 99928th of 3,143

Full data for Sac County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population9,525Vintage 2025 Population Estimates
Population in 20209,791Vintage 2025 Population Estimates
2020 estimates base?9,814Vintage 2025 Population Estimates
Land area575 sq mi2025 Gazetteer Files
Water area3.3 sq mi2025 Gazetteer Files
Total area578.3 sq mi2025 Gazetteer Files
Population density?16.6 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$73,838American Community Survey 2020-2024 5-Year Estimates
Median home value$141,400American Community Survey 2020-2024 5-Year Estimates
Median age46.2American Community Survey 2020-2024 5-Year Estimates
Households4,302American Community Survey 2020-2024 5-Year Estimates
Housing units5,118American 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
-5
118 births, 123 deaths
Net migration
-83
More people moved out than moved in.

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

The 7 areas bordering Sac 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
Ida CountyIowa28 mi6,777
Calhoun CountyIowa27 mi9,562
Buena Vista CountyIowa24 mi20,449
Crawford CountyIowa12 mi16,237
Carroll CountyIowa12 mi20,303
Cherokee CountyIowaa single point11,369
Pocahontas CountyIowaa single point6,819

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

All 99 counties of Iowa

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

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