Gilman City, MO has a population of 373 and is the 21,272nd largest city in the United States. The population density is 444 per sq mi which is 413% higher than the Missouri average and 390% higher than the national average. The median age in Gilman City is 31 which is approximately 20% lower than the Missouri average of 38. In Gilman City, 61% of the population over 15 years of age are married, 96% speak English and 1% speak Spanish. 72% of Gilman City residents were born in Missouri, 24% were born out of state, 0% were born outside of the United States and 4% were foreign born.