| Harry C. Greenlaw | |
| Office: | Member of the Legislative Assembly of New Brunswick |
| Term Start: | 1944 |
| Term End: | 1952 |
| Constituency: | York |
| Birth Date: | 22 August 1895 |
| Birth Place: | Millville, New Brunswick |
| Death Place: | Millville, New Brunswick |
| Spouse: | Winnifred Clark |
| Party: | New Brunswick Liberal Association |
| Occupation: | farmer, produce dealer and exporter |
Harry Cromwell Greenlaw (August 22, 1895 – October 23, 1963) was a Canadian politician. He served in the Legislative Assembly of New Brunswick as member of the Liberal party from 1944 to 1952.[1]