McLouth is a city in Jefferson County, Kansas, United States.

[4][5] It was named for Amos McLouth, the original owner of the town site.

[7] Since 1957, McLouth has been the site of the Threshing Bee and Fall Festival, a celebration of antique farm machinery.

[8] McLouth is part of the Topeka, Kansas Metropolitan Statistical Area.

The 2020 United States census counted 859 people, 346 households, and 232 families in McLouth.

There were 374 housing units at an average density of 649.3 per square mile (250.7/km2).

26.9% of households consisted of individuals and 13.3% had someone living alone who was 65 years of age or older.

There were 384 housing units at an average density of 650.8 per square mile (251.3/km2).

25.8% of all households were made up of individuals, and 10.3% had someone living alone who was 65 years of age or older.

20.2% of all households were made up of individuals, and 8.9% had someone living alone who was 65 years of age or older.

McLouth High School offers dual credit courses with Kansas community colleges.