Marquette is a city located in Clayton County Iowa. With a 2020 population of 431, it is the 482nd largest city in Iowa and the 13950th largest city in the United States . Marquette is currently declining at a rate of -0.23% annually but its population has increased by 14.93% since the most recent census, which recorded a population of 375 in 2010. Marquette reached it's highest population of in . Spanning over 2 miles, Marquette has a population density of 230 people per square mile.
The average household income in Marquette is $48,606 with a poverty rate of 16.67%. The median rental costs in recent years comes to $575 per month, and the median house value is $107,500. The median age in Marquette is 50.4 years, 50.3 years for males, and 50.8 years for females.