Rigby is a small city in and the county seat of Jefferson County, Idaho, United States. The population was 3,945 at the 2010 census, up from 2,998 in 2000.HistoryRigby was founded by members of The Church of Jesus Christ of Latter-day Saints in 1884 and incorporated in 1903. The community was named after William F. Rigby, a prominent early settler and member of the LDS church. A significant majority of Rigby's residents, as well as those of the outlying communities, are members of the LDS faith. Baptist, Presbyterian, and Lutheran faiths also have current local congregations.GeographyRigby is located at, at an elevation of 4856ft above sea level.According to the United States Census Bureau, the city has a total area of 2.36sqmi, of which, 2.35sqmi is land and 0.01sqmi is water.Nearby CommunitiesThe larger "Rigby area" includes such outlying unincorporated communities as Annis, Garfield, Grant, Labelle, and Clark. Other nearby incorporated areas within Jefferson County include Menan, Roberts, Lewisville, and Ririe. Rigby is part of the Idaho Falls Metropolitan Statistical Area, and is located directly between the two larger Idaho cities of Idaho Falls and Rexburg, providing its residents with a wide variety of shopping, entertainment and cultural choices.