West Liberty, IA has a population of 3,737 and is the 7,746th largest city in the United States. The population density is 2,147 per sq mi which is 3667% higher than the Iowa average and 2270% higher than the national average. The median age in West Liberty is 33 which is approximately 12% lower than the Iowa average of 38. In West Liberty, 63% of the population over 15 years of age are married, 57% speak English and 42% speak Spanish. 53% of West Liberty residents were born in Iowa, 24% were born out of state, 1% were born outside of the United States and 22% were foreign born.