Buchanan is a city located in Michigan. With a 2020 population of 4,238, it is the 165th largest city in Michigan and the 5238th largest city in the United States. Buchanan is currently declining at a rate of -0.59% annually and its population has decreased by -4.89% since the most recent census, which recorded a population of 4,456 in 2010. Buchanan reached it's highest population of 5,341 in 1960. Spanning over 3 miles, Buchanan has a population density of 1,680 people per square mile.
The average household income in Buchanan is $56,970 with a poverty rate of 6.99%. The median rental costs in recent years comes to $674 per month, and the median house value is $109,700. The median age in Buchanan is 35.3 years, 32.4 years for males, and 36.8 years for females. For every 100 females there are 92.0 males.