Gilbertville, IA has a population of 723 and is the 17,267th largest city in the United States. The population density is 1,815 per sq mi which is 3223% higher than the Iowa average and 1904% higher than the national average. The median age in Gilbertville is 51 which is approximately 34% higher than the Iowa average of 38. In Gilbertville, 59% of the population over 15 years of age are married, 98% speak English and 1% speak Spanish. 89% of Gilbertville residents were born in Iowa, 11% were born out of state, 0% were born outside of the United States and 0% were foreign born.