Millbrae is a city located in San Mateo County California. With a 2020 population of 22,122, it is the 291st largest city in California and the 1712th largest city in the United States . Millbrae is currently declining at a rate of -0.61% annually but its population has increased by 2.74% since the most recent census, which recorded a population of 21,532 in 2010. Millbrae reached it's highest population of 22,803 in 2015. Spanning over 3 miles, Millbrae has a population density of 6,804 people per square mile.
The average household income in Millbrae is $161,177 with a poverty rate of 5.62%. The median rental costs in recent years comes to $2,508 per month, and the median house value is $1.40 Mn. The median age in Millbrae is 43.9 years, 41.5 years for males, and 45.8 years for females.