| John M. Flewelling | |
| Office: | Member of the Legislative Assembly of New Brunswick |
| Term: | 1925 |
| Constituency: | St. Stephen-Milltown |
| Birth Date: | 28 June 1879 |
| Birth Place: | Woodstock, New Brunswick |
| Death Place: | Montreal, Quebec |
| Spouse: | Sarah J. MacVay |
| Party: | Conservative Party of New Brunswick |
| Occupation: | Insurance, real estate broker |
| Children: | three |
| Residence: | St. Stephen, New Brunswick |
John Medley Flewelling (June 28, 1879 – October 31, 1925) was a Canadian politician. He served in the Legislative Assembly of New Brunswick as member of the Conservative party representing Charlotte County from 1921 to 1925 and St. Stephen-Milltown from 1925 until his death later that year.[1]