Grand Coteau is a city located in Louisiana. With a 2020 population of 911, it is the 178th largest city in Louisiana and the 10706th largest city in the United States. Grand Coteau is currently declining at a rate of -0.44% annually and its population has decreased by -3.80% since the most recent census, which recorded a population of 947 in 2010. Grand Coteau reached it's highest population of 931 in 2014. Spanning over 2 miles, Grand Coteau has a population density of 376 people per square mile.
The average household income in Grand Coteau is $40,270 with a poverty rate of 33.66%. The median rental costs in recent years comes to $632 per month, and the median house value is $99,200. The median age in Grand Coteau is 39.6 years, 31 years for males, and 44.6 years for females. For every 100 females there are 83.2 males.