| John G. Alexander | |
| Image Name: | JohnGAlexander.jpg |
| Caption: | Alexander in 1940 |
| State: | Minnesota |
| District: | 3rd |
| Party: | Republican |
| Term Start: | January 3, 1939 |
| Term End: | January 3, 1941 |
| Predecessor: | Henry Teigan |
| Successor: | Richard Pillsbury Gale |
| Birth Name: | John Grant Alexander |
| Birth Date: | 16 July 1893 |
| Birth Place: | Cortland County, New York, U.S. |
| Death Place: | Minneapolis, Minnesota, U.S. |
| Occupation: | lawyer |
| Alma Mater: | Cornell University |
John Grant Alexander (July 16, 1893 - December 8, 1971) was a Representative to the U.S. Congress from Minnesota.
He was born in Texas Valley, Cortland County, New York; attended the public schools; was graduated from the law department of Cornell University, Ithaca, New York in 1916. He was admitted to the New York bar the same year; moved to Redwood Falls, in 1916.
He was admitted to the Minnesota bar in 1917 and commenced practice in Lynd; engaged in the banking business 1917 - 1923; during World War I served as a private in the Three Hundred and Eighty-sixth Ambulance Company in 1918; engaged in the insurance business and in real estate management in Minneapolis, in 1924; member of the Minnesota National Guard 1927 - 1937; elected as a Republican to the 76th congress, (January 3, 1939 - January 3, 1941); unsuccessful candidate for renomination in 1940; unsuccessful candidate for governor in 1942; resumed the business of real estate management and insurance; resided in Minneapolis, where he died December 8, 1971; interment in Lakewood Cemetery.