Emergency Crime Scene and Biohazard Cleanup in Lemay, MO

Lemay is an unincorporated community and census-designated place in Lemay Township, southern St. Louis County, Missouri — it is not an incorporated city, but a long-settled suburb counted by the Census Bureau.

Lemay was named after Francois Lemai, who operated a ferry boat across the Meramec River in the early 19th century.

Lemay had a population of 17,117 at the 2020 census, up slightly from 16,645 in 2010, spread over about 4.5 square miles along the Mississippi River.

At the 2000 census there were 7,186 households in Lemay, and Census Bureau figures put the community's average household size at about 2.5 people in recent years.

Lemay is home to Jefferson Barracks, an important U.S. Army post from 1826 to 1946 that is the oldest operating U.S. military installation west of the Mississippi River and now hosts Army and Air National Guard units.

Jefferson Barracks National Cemetery, formally designated in 1866 and covering about 331 acres on the old post grounds in Lemay, is one of the oldest and largest national cemeteries in the United States.

The former Jefferson Barracks grounds in Lemay are now shared by two St. Louis County parks — Jefferson Barracks County Park and Sylvan Springs County Park — along with a VA hospital campus and the Missouri Civil War Museum, which opened in 2013.

River City Casino opened in Lemay in 2010 on the western bank of the Mississippi River, with about 90,000 square feet of gaming space on a 56-acre site.

Lemay families are served by local districts including the Hancock Place School District, whose namesake Hancock Invitational is one of the cross-country meets hosted each fall at Jefferson Barracks County Park.

Lemay sits in the 63125 ZIP code area of south St. Louis County, between the Meramec and Mississippi rivers, and takes its township name from the same ferry-operator family that gave the community its name.