Grand Coulee is a city located in Washington. With a 2020 population of 1,046, it is the 201st largest city in Washington and the 10127th largest city in the United States. Grand Coulee is currently declining at a rate of -0.10% annually but its population has increased by 5.87% since the most recent census, which recorded a population of 988 in 2010. Grand Coulee reached it's highest population of 1,055 in 2014. Spanning over 1 miles, Grand Coulee has a population density of 833 people per square mile.
The average household income in Grand Coulee is $53,137 with a poverty rate of 26.79%. The median rental costs in recent years comes to $631 per month, and the median house value is $119,300. The median age in Grand Coulee is 46.8 years, 42.9 years for males, and 50.9 years for females. For every 100 females there are 110.0 males.