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Franklin County, Idaho facts for kids

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Franklin County
Franklin County Courthouse, Preston
Franklin County Courthouse, Preston
Official seal of Franklin County
Map of Idaho highlighting Franklin County
Location within the U.S. state of Idaho
Map of the United States highlighting Idaho
Idaho's location within the U.S.
Country  United States
State  Idaho
Founded January 20, 1913
Named for Franklin D. Richards
Seat Preston
Largest city Preston
 • Total 668 sq mi (1,730 km2)
 • Land 664 sq mi (1,720 km2)
 • Water 4.7 sq mi (12 km2)  0.7%
 • Total 14,194 Increase
 • Density 21.2/sq mi (8.2/km2)
Time zone UTC−7 (Mountain)
 • Summer (DST) UTC−6 (MDT)
Congressional district 2nd

Franklin County is a county located in the U.S. state of Idaho. As of the 2020 Census the county had a population of 14,194. The county seat and largest city is Preston. The county was established in 1913 and named after Franklin D. Richards, an Apostle of The Church of Jesus Christ of Latter-day Saints. It is the only Franklin County in the United States that is not named after Benjamin Franklin. Franklin County is part of the Logan, UT-ID Metropolitan Statistical Area.


Idaho's oldest permanent non-native settlement occurred at Franklin on April 14, 1860 when Mormon settlers led by Thomas S. Smart established the settlement at its present location on the Cub River. It was the seventh and northernmost settlement in the Cache Valley at the time of its settlement and was believed to be in Utah until the Idaho boundary with Utah was finalized in 1872. All of the county's incorporated cities were settled by 1868 with Oxford settled in 1864, Weston in 1865, Dayton in 1868, Clifton in 1869, and Preston by 1868. The Bear River Massacre took place in present-day Franklin County on January 29, 1863.

While the settlers at Franklin were effectively governed by Utah Territory until 1872, the settlers were actually located within Washington Territory from 1860 to 1863 and not within the boundary of any county until Shoshone was created in 1861. They became part of Idaho County in 1861, and Boise in 1863. And finally, under Idaho Territory, they briefly became part of Owyhee County before being transferred to Oneida County in 1864. At the 1870 census, the three Franklin County precincts were enumerated in Cache County, Utah, containing 1,053 residents. In 1885, the northern portion of the county was transferred to Bingham County at its creation. At the 1890 Census, Bingham and Oneida Counties returned five precincts of Dayton, Franklin, Oxford, Preston, and Treasureton with 4,969 residents. The Oxford and Treasureton precincts were transferred to Bannock County at its establishment in 1893. Bannock County retained the Oxford precinct and renamed the Treasureton Precinct as Cleveland. By 1900, Oneida contained seven precincts that would later be entirely within Franklin County. Together, the nine precincts comprised a population of 6,566 at that time. The Cleveland and Treasureton areas were transferred to Franklin County in 1918. The portion of the Thatcher area in Franklin County remained within Bannock County until 1946.


According to the U.S. Census Bureau, the county has a total area of 668 square miles (1,730 km2), of which 664 square miles (1,720 km2) is land and 4.7 square miles (12 km2) (0.7%) is water.

Adjacent counties

Major highways

  • US 91.svg US 91
  • ID-34.svg SH-34
  • ID-36.svg SH-36

National protected area


Historical population
Census Pop.
1920 8,650
1930 9,379 8.4%
1940 10,229 9.1%
1950 9,867 −3.5%
1960 8,467 −14.2%
1970 7,373 −12.9%
1980 8,895 20.6%
1990 9,232 3.8%
2000 11,329 22.7%
2010 12,786 12.9%
2020 14,194 11.0%
U.S. Decennial Census
1790-1960 1900-1990
1990-2000 2010-2020 2020

2010 census

As of the 2010 United States Census, there were 12,786 people, 4,079 households, and 3,259 families living in the county. The population density was 19.3 inhabitants per square mile (7.5/km2). There were 4,528 housing units at an average density of 6.8 per square mile (2.6/km2). The racial makeup of the county was 94.4% White, 0.4% American Indian, 0.2% black or African American, 0.1% Pacific islander, 0.1% Asian, 3.3% from other races, and 1.6% from two or more races. Those of Hispanic or Latino origin made up 6.6% of the population. In terms of ancestry, 34.6% were English, 11.5% were German, 11.0% were Danish, 8.0% were American, and 7.2% were Swedish.

Of the 4,079 households, 44.1% had children under the age of 18 living with them, 70.6% were married couples living together, 6.3% had a female householder with no husband present, 20.1% were non-families, and 17.9% of all households were made up of individuals. The average household size was 3.11 and the average family size was 3.56. The median age was 31.5 years.

The median income for a household in the county was $45,682 and the median income for a family was $50,586. Males had a median income of $41,208 versus $25,717 for females. The per capita income for the county was $17,967. About 9.4% of families and 13.7% of the population were below the poverty line, including 20.4% of those under age 18 and 6.7% of those age 65 or over.



Unincorporated communities

See also

Kids robot.svg In Spanish: Condado de Franklin (Idaho) para niños

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