Heyburn is a city in Minidoka County, Idaho, United States. The population was 3,700 at the 2020 census, up from 3,089 in 2010. It is part of the Burley micropolitan area. The city was named after Weldon B. Heyburn, a U.S. senator for Idaho from 1903 to 1912. Geography Heyburn sits on the southern edge of Minidoka County, bounded to the south by the Snake River, which forms the Cassia County line. The city of Burley borders Heyburn to the south and west. Interstate 84 passes through the north side of the city, with access from Exits 208 and 211. I-84 leads west to the Twin Falls area and southeast to Ogden, Utah. U.S. Route 30 passes through the southeast part of Heyburn running from Exit 211 of I-84 southwest across the Snake River into Burley. Idaho State Highway 27 passes through the west side of Heyburn, connecting Burley to the south with Paul to the north. According to the United States Census Bureau, Heyburn has a total area of , of which , or 1.66%, are water. Demographics 2010 census As of the census of 2010, there were 3,089 people, 1,109 households, and 830 families residing in the city. The population density was . There were 1,165 housing units at an average density of . The racial makeup of the city was 77.4% White, 0.6% African American, 2.3% Native American, 0.6% Asian, 16.6% from other races, and 2.6% from two or more races. Hispanic or Latino of any race were 32.5% of the population. There were 1,109 households, of which 38.5% had children under the age of 18 living with them, 58.3% were married couples living together, 10.6% had a female householder with no husband present, 6.0% had a male householder with no wife present, and 25.2% were non-families. 21.9% of all households were made up of individuals, and 7.9% had someone living alone who was 65 years of age or older. The average household size was 2.79 and the average family size was 3.26. The median age in the city was 32.8 years. 29.8% of residents were under the age of 18; 8.9% were between the ages of 18 and 24; 24.1% were from 25 to 44; 23.6% were from 45 to 64; and 13.6% were 65 years of age or older. The gender makeup of the city was 50.4% male and 49.6% female. 2000 census As of