Grand Coulee is a city located in Washington. With a 2020 population of 1,048, it is the 201st largest city in Washington and the 10114th largest city in the United States. Grand Coulee is currently declining at a rate of -0.38% annually but its population has increased by 6.07% since the most recent census, which recorded a population of 988 in 2010. Grand Coulee reached it's highest population of 1,056 in 2018. Spanning over 1 miles, Grand Coulee has a population density of 834 people per square mile.
The average household income in Grand Coulee is $54,479 with a poverty rate of 23.39%. The median rental costs in recent years comes to $680 per month, and the median house value is $115,800. The median age in Grand Coulee is 43.7 years, 39.9 years for males, and 46.1 years for females. For every 100 females there are 109.2 males.