[4] In 2011, Bloomberg Businessweek magazine named Crestwood the "Best Place to Raise Kids in Missouri," lauding the community for top-tier schools and excellent municipal services.

According to the United States Census Bureau, the city has a total area of 3.60 square miles (9.32 km2), all of it land.

Adjacent to Whitecliff Park in the small city of Grantwood Village is the animal reserve owned by Anheuser-Busch called Grant's Farm, which is free and open to the public during the summer.

Grant's Farm, now home to free-roaming buffalo, zebras, and deer among other animals, is located on property formerly owned by president Ulysses S. Grant in the period between the Mexican War and the Civil War.

He was a Revolutionary War soldier who was a personal bodyguard to Gen. George Washington at Valley Forge.

He was also one of the pioneers at Fort Boonesborough in Madison County, Kentucky.

Crestwood is also the final resting place of Revered Moses Dickson buried in Father Dickson Cemetery and is one of the historic stops along Grant's Trail a biking and walking trail in St. Louis County, Missouri[6] The 2020 United States census[8] counted 12,404 people, 4,737 households, and 3,434 families in Crestwood.

There were 4,869 housing units at an average density of 1,356.3 per square mile (524.1/km2).

Of all households, 23.5% consisted of individuals and 13.9% had someone living alone who was 65 years of age or older.

There were 5,452 housing units at an average density of 1,514.4 per square mile (584.7/km2).

30.6% of all households were made up of individuals, and 16.5% had someone living alone who was 65 years of age or older.

There were 5,214 housing units at an average density of 1,448.7 per square mile (559.3/km2).

27.5% of all households were made up of individuals, and 14.9% had someone living alone who was 65 years of age or older.