Grundy Center is a city located in Grundy County Iowa. It is also the county seat of Grundy County. With a 2020 population of 2,668, it is the 127th largest city in Iowa and the 6625th largest city in the United States . Grundy Center is currently declining at a rate of -0.04% annually and its population has decreased by -1.40% since the most recent census, which recorded a population of 2,706 in 2010. Grundy Center reached it's highest population of in . Spanning over 3 miles, Grundy Center has a population density of 1,038 people per square mile.
The average household income in Grundy Center is $71,353 with a poverty rate of 7.36%. The median rental costs in recent years comes to $549 per month, and the median house value is $115,900. The median age in Grundy Center is 45 years, 39.9 years for males, and 50.3 years for females.