Palmer, IA has a population of 156 and is the 25,497th largest city in the United States. The population density is 369 per sq mi which is 575% higher than the Iowa average and 307% higher than the national average. The median age in Palmer is 42 which is approximately 11% higher than the Iowa average of 38. In Palmer, 57% of the population over 15 years of age are married, 81% speak English and 13% speak Spanish. 64% of Palmer residents were born in Iowa, 23% were born out of state, 0% were born outside of the United States and 13% were foreign born.