Lamoni is a city in Decatur County, Iowa, United States. The population was 2,444 at the 2000 census. Lamoni is the home of Graceland University, affiliated with the Community of Christ. The city is a significant historic area for the Community of Christ church with the Liberty Hall museum. In 1870 a stewardship association of church members, known as the Order of Enoch, purchased over three thousand acres (12 km²) of land in southern Iowa as a place for gathering.