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Benton County, Washington
Logo of Benton County, Washington
Map of Washington highlighting Benton County
Location in the state of Washington (state)
Map of USA WA
Washington's location in the U.S.
Founded March 8, 1905
Named for Thomas Hart Benton
Senator from Missouri
Seat Prosser
Largest city Kennewick
 - Total
 - Land
 - Water

1,760 sq mi (4,558 km²)
1,703 sq mi (4,411 km²)
57 sq mi (148 km²), 3.24%
 - (2011)
 - Density

103/sq mi (39.7/km²)
Congressional district 4th
Time zone Pacific: UTC-8/-7

Benton County is a county located in the south-central portion of the U.S. state of Washington. The Columbia River makes up the north, south, and east boundaries of the county. As of the 2010 census, its population was 175,177.[1] The county seat is Prosser, and its largest city is Kennewick. It was named after Missouri Senator Thomas Hart Benton.

Benton County was created out of Klickitat County and Yakima County on March 8, 1905.[2]


According to the U.S. Census Bureau, the county has a total area of 1,760 square miles (4,558.4 km2), of which 1,703 square miles (4,410.7 km2) is land and 57 square miles (147.6 km2) (3.24%) is water.

Adjacent counties Edit

National protected areaEdit


The area of south-central Washington occupied by Benton County has been known primarily as an agricultural hub since its settlement by white Americans. The rise of viticulture has had a profound impact on the agricultural and tourism industries over the past two decades, and has in many ways reshaped the reputation of the region.

Geographic features Edit

Sites of interest Edit

Major highways Edit


Historical populations
Census Pop.
1910 7,937
1920 10,903 37.4%
1930 10,952 0.4%
1940 12,053 10.1%
1950 51,370 326.2%
1960 62,070 20.8%
1970 67,540 8.8%
1980 109,444 62.0%
1990 112,560 2.8%
2000 142,475 26.6%
2010 175,177 23.0%
Est. 2011 180,678 26.8%
U.S. Decennial Census
2011 estimate

As of the census[3] of 2000, there were 142,475 people, 52,866 households, and 38,063 families residing in the county. The population density was 84 people per square mile (32/km²). There were 55,963 housing units at an average density of 33 per square mile (13/km²). The racial makeup of the county was 86.25% White, 0.93% Black or African American, 0.82% Native American, 2.20% Asian, 0.11% Pacific Islander, 7.01% from other races, and 2.69% from two or more races. 12.50% of the population were Hispanic or Latino of any race. 18.1% were of German, 11.0% English, 9.1% United States or American and 8.4% Irish ancestry according to Census 2000. 86.4% spoke English and 10.3% Spanish as their first language.

There were 52,866 households out of which 38.20% had children under the age of 18 living with them, 57.60% were married couples living together, 10.20% had a female householder with no husband present, and 28.00% were non-families. 23.20% of all households were made up of individuals and 7.70% had someone living alone who was 65 years of age or older. The average household size was 2.68 and the average family size was 3.17.

In the county, the population was spread out with 29.70% under the age of 18, 8.60% from 18 to 24, 28.50% from 25 to 44, 22.90% from 45 to 64, and 10.30% who were 65 years of age or older. The median age was 34 years. For every 100 females there were 98.70 males. For every 100 females age 18 and over, there were 96.30 males.

The median income for a household in the county was $47,044, and the median income for a family was $54,146. Males had a median income of $45,556 versus $27,232 for females. The per capita income for the county was $21,301. About 7.80% of families and 10.30% of the population were below the poverty line, including 14.30% of those under age 18 and 6.90% of those age 65 or over.

Cities Edit

Benton County


Other census-recognized communities Edit

Other communities Edit

Ghost townsEdit

See alsoEdit


Further readingEdit

External linksEdit

Coordinates: 46°15′N 119°30′W / 46.25, -119.50

This page uses content from the English language Wikipedia. The original content was at Benton County, Washington. The list of authors can be seen in the page history. As with this Familypedia wiki, the content of Wikipedia is available under the Creative Commons License.

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