Heyburn is a city in Minidoka County, Idaho, United States. The population was 3,089 at the 2010 census. 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.
According to the United States Census Bureau, the city has a total area of 2.74 square miles (7.10 km2), of which, 2.70 square miles (6.99 km2) is land and 0.04 square miles (0.10 km2) is water.
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 1,144.1 inhabitants per square mile (441.7/km2). There were 1,165 housing units at an average density of 431.5 per square mile (166.6/km2). 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.