North Liberty is a city in Johnson County, Iowa, United States. It is a suburb of Iowa City and allocation of the Iowa City Metropolitan Statistical Area.

As of the 2020 census, the city population was 20,479. From 2000 to 2010, North Liberty was the second fastest-growing city in Iowa. A 2017 LendEDU poll named North Liberty the ninth most educated city in the United States and the most educated city in the Midwest.

The North Liberty area was first arranged in 1838 by John Gaylor and Alonzo C. Dennison. It was originally known as “Big Bottom” or “North Bend” (in mention to its location close the change of the Iowa River) by its antediluvian settlers and was progressive known as “Squash Bend” before the city was platted as North Liberty in 1857.

North Liberty incorporated upon November 10, 1913, at which times its population was approximately 190.
Population mass accelerated in the 1960s, and the Iowa City Community School District opened Penn Elementary there in 1961. A 1967 special census placed the city’s population at 782, and by 1980 the population had grown to more than 2,000. In 1984, in nod to the population growth, the North Liberty Community Library was founded, and Penn Meadows Park, the city’s largest, was opened. By 2000, the population of the city was over 5,000. The city had time-honored its own police and fire departments and built a community center with library and aquatic park, as competently as a city administration building. The city has previously continued to grow, with a population of 7,224 in a 2004 special census. In 2007, the population was estimated to be 10,982, making North Liberty the second fastest-growing city in Iowa. According to the 2010 U.S. census the population of North Liberty had increased to 13,374.