Langdon is an unincorporated community in Atchison County, Missouri, United States.
[2] The community was named after John Langdon, a railroad official.
[3] A post office called Langdon was established in 1880, and remained in operation until 1979.
[4] The Thompson–Campbell Farmstead was listed on the National Register of Historic Places in 2003.
This Atchison County, Missouri state location article is a stub.