Gilman is a city located in Marshall County Iowa. With a 2020 population of 466, it is the 464th largest city in Iowa and the 13614th largest city in the United States . Gilman is currently declining at a rate of -1.89% annually and its population has decreased by -8.45% since the most recent census, which recorded a population of 509 in 2010. Gilman reached it's highest population of in . Spanning over 1 miles, Gilman has a population density of 861 people per square mile.
The average household income in Gilman is $62,100 with a poverty rate of 10.50%. The median rental costs in recent years comes to $413 per month, and the median house value is $84,400. The median age in Gilman is 36.4 years, 27.8 years for males, and 43.4 years for females.