# Bannock County, Idaho

Bannock County is a county in the southeastern part of Idaho. As of the 2020 census, the population was 87,018, making it the sixth-most populous county in Idaho. The county seat and largest city is Pocatello. The county was established in 1893 and named after the local Bannock tribe. It is one of the counties with territories included in the Fort Hall Indian Reservation of the federally recognized Shoshone-Bannock Tribes.
The county would get international attention in 2006 when the murder of Cassie Jo Stoddart occurred in a home located in the area.

## Geography

According to the United States Census Bureau, the county has a total area of 1,147 square miles (2,970 km$^2$), of which 1,112 square miles (2,880 km$^2$) is land and 35 square miles (91 km$^2$) (3.1%) is water. The Portneuf River flows through the county, meeting the Snake River (the American Falls Reservoir) at the county's lowest point, its northwestern corner. Bonneville Peak, on the eastern border in the Portneuf Range, is the county's highest point at 9,271 feet (2,826 m) ASL; on its western slopes is the Pebble Creek ski area.

### Adjacent counties

* Bingham County - north
* Caribou County - east
* Franklin County - southeast
* Oneida County - southwest
* Power County - west

### Highways

* - Interstate 15
* - Interstate 86
* - US 30
* - US 91
* - SH-40

### National protected area

* Caribou National Forest (part)

## Demographics

Bannock County is part of the Pocatello, Idaho Metropolitan Statistical Area.

### 2010 census

As of the 2010 census, there were 82,839 people, 30,682 households, and 20,836 families in the county. The population density was 74.5 inhabitants per square mile (28.8/km$^2$). There were 33,191 housing units at an average density of 29.8 per square mile (11.5/km$^2$). The racial makeup of the county was 89.8% white, 3.2% American Indian, 1.3% Asian, 0.8% black or African American, 0.2% Pacific Islander, 2.1% from other races, and 2.7% from two or more races. Those of Hispanic or Latino origin made up 6.7% of the population. In terms of ancestry, 23.4% were English, 16.9% were German, 9.3% were Irish, and 7.0% were American.
Of the 30,682 households, 35.5% had children under the age of 18 living with them, 52.2% were married couples living together, 10.7% had a female householder with no husband present, 32.1% were non-families, and 24.9% of all households were made up of individuals. The average household size was 2.64 and the average family size was 3.17. The median age was 31.4 years.
The median income for a household in the county was $44,848 and the median income for a family was $54,650. Males had a median income of $43,538 versus $28,870 for females. The per capita income for the county was $21,275. About 10.6% of families and 14.0% of the population were below the poverty line, including 16.6% of those under age 18 and 4.2% of those aged 65 or over.

### 2000 census

As of the 2000 census, there were 75,565 people, 27,192 households, and 19,224 families in the county. The population density was 68 inhabitants per square mile (26/km$^2$). There were 29,102 housing units at an average density of 26 per square mile (10/km$^2$). The racial makeup of the county was 91.29% White, 0.59% Black or African American, 2.91% Native American, 0.99% Asian, 0.16% Pacific Islander, 2.08% from other races, and 1.98% from two or more races. 4.68% of the population were Hispanic or Latino of any race. 23.1% were of English, 14.2% German, 11.1% American, and 7.4% Irish ancestry.
There were 27,192 households, out of which 36.50% had children under the age of 18 living with them, 56.70% were married couples living together, 10.00% had a female householder with no husband present, and 29.30% were non-families. 22.80% of all households were made up of individuals, and 7.60% had someone living alone who was 65 years of age or older. The average household size was 2.69 and the average family size was 3.20.
The county population contained 28.10% under the age of 18, 14.60% from 18 to 24, 27.20% from 25 to 44, 20.00% from 45 to 64, and 10.10% who were 65 years of age or older. The median age was 30 years. For every 100 females, there were 97.70 males. For every 100 females aged 18 and over, there were 94.40 males.
The median income for a household in the county was $36,683, and the median income for a family was $44,192. Males had a median income of $36,056 versus $23,595 for females. The per capita income for the county was $17,148. About 9.80% of families and 13.90% of the population were below the poverty line, including 15.60% of those under age 18 and 7.60% of those aged 65 or over.

## Government and politics

The last Democratic candidate for President to win the county was Lyndon B. Johnson in 1964. Subsequent Republican victories have been by smaller margins than those in the rest of Eastern Idaho, due to the presence of Idaho State University.
United States presidential election results for Bannock County, Idaho :
| Year | Republican | Republican | Democratic | Democratic | Third party(ies) | Third party(ies) |
| Year | No. | % | No. | % | No. | % |
| 2024 | 24,329 | 60.86% | 14,306 | 35.79% | 1,341 | 3.35% |
| 2020 | 23,331 | 58.65% | 14,682 | 36.91% | 1,770 | 4.45% |
| 2016 | 17,180 | 51.41% | 10,342 | 30.95% | 5,894 | 17.64% |
| 2012 | 21,010 | 59.14% | 13,214 | 37.20% | 1,299 | 3.66% |
| 2008 | 19,356 | 54.62% | 14,792 | 41.74% | 1,289 | 3.64% |
| 2004 | 21,479 | 61.64% | 12,903 | 37.03% | 462 | 1.33% |
| 2000 | 18,223 | 59.07% | 10,892 | 35.30% | 1,737 | 5.63% |
| 1996 | 14,058 | 44.80% | 12,806 | 40.81% | 4,513 | 14.38% |
| 1992 | 12,016 | 37.30% | 11,091 | 34.43% | 9,104 | 28.26% |
| 1988 | 14,986 | 52.40% | 13,074 | 45.71% | 541 | 1.89% |
| 1984 | 18,742 | 65.77% | 9,399 | 32.98% | 355 | 1.25% |
| 1980 | 18,477 | 61.88% | 8,639 | 28.93% | 2,743 | 9.19% |
| 1976 | 13,172 | 53.65% | 10,261 | 41.80% | 1,117 | 4.55% |
| 1972 | 12,856 | 57.93% | 7,840 | 35.33% | 1,495 | 6.74% |
| 1968 | 10,234 | 47.97% | 9,084 | 42.58% | 2,016 | 9.45% |
| 1964 | 7,825 | 36.72% | 13,483 | 63.28% | 0 | 0.00% |
| 1960 | 9,157 | 42.11% | 12,586 | 57.89% | 0 | 0.00% |
| 1956 | 10,476 | 53.51% | 9,101 | 46.49% | 0 | 0.00% |
| 1952 | 10,864 | 55.25% | 8,771 | 44.61% | 27 | 0.14% |
| 1948 | 5,580 | 35.86% | 9,679 | 62.20% | 301 | 1.93% |
| 1944 | 5,413 | 35.84% | 9,681 | 64.09% | 11 | 0.07% |
| 1940 | 5,419 | 34.05% | 10,493 | 65.94% | 1 | 0.01% |
| 1936 | 3,830 | 28.60% | 9,443 | 70.51% | 120 | 0.90% |
| 1932 | 4,676 | 35.81% | 8,271 | 63.34% | 112 | 0.86% |
| 1928 | 5,297 | 53.22% | 4,602 | 46.24% | 54 | 0.54% |
| 1924 | 4,520 | 44.99% | 1,612 | 16.05% | 3,914 | 38.96% |
| 1920 | 4,871 | 62.00% | 2,986 | 38.00% | 0 | 0.00% |
| 1916 | 2,950 | 40.10% | 4,084 | 55.52% | 322 | 4.38% |
| 1912 | 2,316 | 48.04% | 1,486 | 30.82% | 1,019 | 21.14% |
| 1908 | 2,690 | 56.75% | 1,892 | 39.92% | 158 | 3.33% |
| 1904 | 2,826 | 68.58% | 1,063 | 25.79% | 232 | 5.63% |
| 1900 | 1,684 | 51.58% | 1,581 | 48.42% | 0 | 0.00% |
| 1896 | 228 | 14.27% | 1,363 | 85.29% | 7 | 0.44% |
Similar to other Idaho counties, an elected three-member county commission heads the county government. Other elected officials include clerk, treasurer, sheriff, assessor, coroner, and prosecutor.
Like the rest of eastern Idaho, Bannock County has a significant Latter Day Saint population which tends to strongly vote Republican. However, a substantial trade union presence in the county - as well as the Idaho State University community - often gives Democrats an overall advantage, especially in local races. Bannock County routinely elects more Democrats than Republicans to county-level offices.
At the state level, Bannock County is located in Legislative Districts 28 and 29. Democrats currently control two of these six seats in the Idaho Legislature. In 2016, Republicans were able to win House Seat A in District 29.
Idaho Department of Correction operates the Pocatello Women's Correctional Center (PWCC) in Pocatello and in Bannock County.

## Communities
### Cities

* Arimo
* Chubbuck
* Downey
* Inkom
* Lava Hot Springs
* McCammon
* Pocatello

### Census-designated places

* Fort Hall (part)
* Tyhee

### Unincorporated communities

* Blackrock
* Portneuf
* Robin
* Swanlake
* Virginia
* Zenda

## Education

School districts include:
* Grace Joint School District 148
* Marsh Valley Joint School District 21
* Pocatello/Chubbuck School District 25
* Preston Joint School District 201
* West Side Joint School District 202
There is also a Bureau of Indian Education (BIE)-affiliated school, Shoshone Bannock Jr./Sr. High School.