Kane County is a county in the U.S. state of Utah. As of the 2020 United States census, the population was 7,667. Its county seat and largest city is Kanab.

The county was created on January 16, 1864, by the old federal Utah Territory (1850–1896) territorial legislature, with areas partitioned off from earlier Washington County. It was named for Col. Thomas L. Kane (1822–1883), a friend of the Latter Day Saint (Mormons) settlers when they first arrived westward, led by patriarch Brigham Young (1801–1877), in the 1840s and 1850s. The county boundary was readjusted later, first in 1869, when a portion was returned back to Washington County; second in 1880, when San Juan County was partitioned off and created; and third, in 1883, when additional portions were partitioned from Kane and added to Iron and back to Washington counties.

Kane County lies on the south line of the state of Utah. Its south border abuts the northern border of the state of Arizona. The Colorado River, reformed as Lake Powell, forms its eastern border. Grand Staircase–Escalante National Monument covers much of the county. A rugged and inhospitable country of deserts, mountains, and cliffs make up the terrain, with breathtaking scenery in every area. Parts of Bryce Canyon National Park and Zion National Park extend into the northern and western portions of the county. The eastern part of the county is part of the Glen Canyon National Recreation Area. The county has a total area of 4,109 square miles (10,640 km²), of which 3,990 square miles (10,300 km²) is land and 118 square miles (310 km²) (2.9%) is water.

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According to the 2020 United States census and 2020 American Community Survey, there were 7,667 people in Kane County with a population density of 1.9 people per square mile (0.7/km²). Among non-Hispanic or Latino people, the racial makeup was 6,924 (90.3%) White, 27 (0.4%) African American, 119 (1.6%) Native American, 59 (0.8%) Asian, 1 (0.0%) Pacific Islander, 18 (0.2%) from other races, and 197 (2.6%) from two or more races. 322 (4.2%) people were Hispanic or Latino.

There were 3,808 (49.67%) males and 3,859 (50.33%) females, and the population distribution by age was 1,752 (22.9%) under the age of 18, 3,950 (51.5%) from 18 to 64, and 1,965 (25.6%) who were at least 65 years old. The median age was 44.9 years.

There were 3,081 households in Kane County with an average size of 2.49 of which 1,987 (64.5%) were families and 1,094 (35.5%) were non-families. Among all families, 1,663 (54.0%) were married couples, 110 (3.6%) were male householders with no spouse, and 214 (6.9%) were female householders with no spouse. Among all non-families, 932 (30.2%) were a single person living alone and 162 (5.3%) were two or more people living together. 784 (25.4%) of all households had children under the age of 18. 2,409 (78.2%) of households were owner-occupied while 672 (21.8%) were renter-occupied.

The median income for a Kane County household was $49,486 and the median family income was $69,722, with a per-capita income of $28,142. The median income for males that were full-time employees was $41,368 and for females $34,986. 13.1% of the population and 6.0% of families were below the poverty line.