Bonneville County, Idaho

Bonneville County
	Bonneville County, Idaho
	; Seal
	; Seal
	; Location in the state of Idaho
	; Idaho's location in the U.S.
Founded	February 7, 1911
Named for	Benjamin Bonneville
Seat	Idaho Falls
Largest city	Idaho Falls
Area; - Total; - Land; - Water	; 1,900.65 sq mi (4,923 km²); 1,868.48 sq mi (4,839 km²); 32.18 sq mi (83 km²), 1.69%
Population; - (2010); - Density	; 104,234; 44/sq mi (17/km²)
Time zone	Mountain: UTC-7/-6
Website	www.co.bonneville.id.us

Bonneville County is a county located in the U.S. state of Idaho. As of the 2010 census, the county had a population of 104,234^[1].^[2] Its county seat and largest city is Idaho Falls.^[3] As the most populous county in eastern Idaho, Bonneville County currently ranks fourth in the state, behind Ada, Canyon and Kootenai.

Bonneville County was established in 1911, named after Benjamin Bonneville (1796–1878), a French-born officer in the U.S. Army, fur trapper, and explorer in the American West. Bonneville is noted for his expeditions to the Oregon Country and the Great Basin in the 1830s.^[4]

The county was partitioned from Bingham County, which was part of Oneida County until 1885.^[5] Bonneville County is part of the Idaho Falls Metropolitan Statistical Area.

Geography [edit]

According to the 2000 census, the county has a total area of 1,900.65 square miles (4,922.7 km²), of which 1,868.48 square miles (4,839.3 km²) (or 98.31%) is land and 32.18 square miles (83.3 km²) (or 1.69%) is water.^[6] The Snake River flows northwest through the Bonneville County, beginning at the Wyoming border as the Palisades Reservoir. The river exits the county about midway on its northern border, turns and re-enters approximately 20 miles (32 km) west to flow southwest through Idaho Falls .

Adjacent counties [edit]

Madison County - north
Teton County - north
Teton County, Wyoming - northeast
Lincoln County, Wyoming - southeast
Caribou County - south
Bingham County - west
Jefferson County - northwest

National protected areas [edit]

Caribou National Forest (part)
Grays Lake National Wildlife Refuge (part)
Targhee National Forest (part)

Highways [edit]

Demographics [edit]

Recent suburban development in Bonneville County near Idaho Falls

Historical populations
Census	Pop.	%±
1920	17,501	—
1930	19,664	12.4%
1940	25,697	30.7%
1950	30,210	17.6%
1960	46,906	55.3%
1970	51,250	9.3%
1980	65,980	28.7%
1990	72,207	9.4%
2000	82,522	14.3%
2010	104,234	26.3%
sources:^[2]^[7]

As of the census^[1] of 2000, there were 82,522 people, 28,753 households, and 21,449 families residing in the county. The population density was 44 people per square mile (17/km²). There were 30,484 housing units at an average density of 16 per square mile (6/km²). The racial makeup of the county was 92.79% White, 0.49% Black or African American, 0.65% Native American, 0.82% Asian, 0.07% Pacific Islander, 3.72% from other races, and 1.46% from two or more races. 6.91% of the population were Hispanic or Latino of any race. 25.3% were of English, 14.3% German and 12.2% American ancestry according to Census 2000.

There were 28,753 households out of which 40.60% had children under the age of 18 living with them, 62.00% were married couples living together, 9.30% had a female householder with no husband present, and 25.40% were non-families. 21.40% of all households were made up of individuals and 7.80% had someone living alone who was 65 years of age or older. The average household size was 2.83 and the average family size was 3.33.

In the county the population was spread out with 32.10% under the age of 18, 9.50% from 18 to 24, 27.20% from 25 to 44, 21.00% from 45 to 64, and 10.20% who were 65 years of age or older. The median age was 32 years. For every 100 females there were 99.40 males. For every 100 females age 18 and over, there were 96.20 males.

The median income for a household in the county was $41,805, and the median income for a family was $48,216. Males had a median income of $38,745 versus $22,514 for females. The per capita income for the county was $18,326. About 7.40% of families and 10.10% of the population were below the poverty line, including 12.20% of those under age 18 and 5.90% of those age 65 or over.