Martensdale is a city located in Warren County Iowa. With a 2020 population of 449, it is the 473rd largest city in Iowa and the 13775th largest city in the United States . Martensdale is currently declining at a rate of -1.32% annually and its population has decreased by -3.44% since the most recent census, which recorded a population of 465 in 2010. Martensdale reached it's highest population of in . Spanning over 0 miles, Martensdale has a population density of 1,180 people per square mile.
The average household income in Martensdale is $57,417 with a poverty rate of 12.55%. The median rental costs in recent years comes to $658 per month, and the median house value is $133,800. The median age in Martensdale is 29.7 years, 29.6 years for males, and 31 years for females.