Walnut Creek is a city located in California. With a 2020 population of 70,812, it is the 126th largest city in California and the 521st largest city in the United States. Walnut Creek is currently growing at a rate of 0.46% annually and its population has increased by 10.35% since the most recent census, which recorded a population of 64,173 in 2010. Walnut Creek reached it's highest population of 70,812 in 2021. Spanning over 20 miles, Walnut Creek has a population density of 3,584 people per square mile.
The average household income in Walnut Creek is $141,473 with a poverty rate of 5.33%. The median rental costs in recent years comes to $2,095 per month, and the median house value is $793,100. The median age in Walnut Creek is 47.8 years, 45.1 years for males, and 50.4 years for females. For every 100 females there are 86.2 males.