Lineville, IA has a population of 209 and is the 24,255th largest city in the United States. The population density is 233 per sq mi which is 327% higher than the Iowa average and 157% higher than the national average. The median age in Lineville is 50 which is approximately 31% higher than the Iowa average of 38. In Lineville, 64% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 73% of Lineville residents were born in Iowa, 27% were born out of state, 0% were born outside of the United States and 0% were foreign born.