Lamar is a city located in Missouri. With a 2020 population of 4,286, it is the 153rd largest city in Missouri and the 5195th largest city in the United States. Lamar is currently declining at a rate of -0.23% annually and its population has decreased by -5.43% since the most recent census, which recorded a population of 4,532 in 2010. Lamar reached it's highest population of 4,527 in 2010. Spanning over 6 miles, Lamar has a population density of 822 people per square mile.
The average household income in Lamar is $48,957 with a poverty rate of 30.48%. The median rental costs in recent years comes to $585 per month, and the median house value is $90,200. The median age in Lamar is 41.9 years, 38.9 years for males, and 45.5 years for females. For every 100 females there are 92.8 males.