John Cosgrove (Missouri politician)

John Cosgrove (September 12, 1839 – August 15, 1925) was a Democratic Representative from Missouri's 6th congressional district.

He attended schools in Redwood, New York, and then traveled in the western United States, where his activities included mining for gold.

During the American Civil War Cosgrove was rejected for military service after he failed his physical exam, but he joined a unit of the National Guard.

he attained the rank of first lieutenant, and served on the Canada–US border during the increased security measures which followed the Confederate attack in Vermont that came to be called the St. Albans Raid.

He served on the local school board for several years, and was a delegate to the 1920 Democratic National Convention.