Lake Bluff is a city located in Lake County Illinois. With a 2020 population of 5,506, it is the 314th largest city in Illinois and the 4509th largest city in the United States . Lake Bluff is currently declining at a rate of -0.51% annually and its population has decreased by -3.77% since the most recent census, which recorded a population of 5,722 in 2010. Lake Bluff reached it's highest population of 6,056 in 2000. Spanning over 4 miles, Lake Bluff has a population density of 1,351 people per square mile.
The average household income in Lake Bluff is $232,616 with a poverty rate of 1.90%. The median rental costs in recent years comes to $2,146 per month, and the median house value is $642,700. The median age in Lake Bluff is 45 years, 46 years for males, and 44 years for females.