West Des Moines, IA has a population of 61,624 and is the 620th largest city in the United States. The population density is 1,322 per sq mi which is 2321% higher than the Iowa average and 1360% higher than the national average. The median age in West Des Moines is 35 which is approximately 9% lower than the Iowa average of 38. In West Des Moines, 57% of the population over 15 years of age are married, 87% speak English and 4% speak Spanish. 64% of West Des Moines residents were born in Iowa, 24% were born out of state, 1% were born outside of the United States and 11% were foreign born.