| John William Cummings | |
| Office: | Delegate to the 1917 Massachusetts Constitutional Convention |
| Term Start: | June 6, 1917 |
| Term End: | August 13, 1919 |
| Term Start2: | 1885 |
| Term End2: | 1885 |
| Successor2: | William S. Greene |
| Term Start3: | 1887 |
| Term End3: | 1888 |
| Majority3: | 261 in 1886, and 196 in 1887. |
| Successor3: | James Frederick Jackson |
| Office5: | Member of the Massachusetts State Senate |
| Term Start5: | 1883 |
| Term End5: | 1883 |
| Office6: | Member of the Massachusetts House of Representatives 8th Bristol District |
| Term Start6: | 1878 |
| Term End6: | 1878 |
| Party: | Independent, (1917–1918) |
| Birth Date: | August 25, 1855 |
| Birth Place: | Stockport, England |
| Death Date: | August 28, 1929 (aged 74) |
| Profession: | Lawyer |
| Spouse: | Mary Catherine Cecelia Brennan |
| Children: | Mary Cummings, b. June 28, 1884, d. 1884; Margaret Cummings, b. September 30, 1885, d. April 8, 1968. Sarah T. Cummings, b. June 11, 1887, d. abt. 1920. John Brennan Cummings b. June 19, 1889, d. August 28, 1978. Mary C. Cummings, b. March 9, 1891, d. May 2, 1971. Frances Mary Cummings, b. October 16, 1900 d. January 23, 1981. Joseph W. Cummings, b. March 10, 1894, d. January 21, 1981. |
John William Cummings (August 25, 1855 – August 28, 1929) was an American lawyer and politician who served in both branches of the Massachusetts legislature, in the Massachusetts Constitutional Convention of 1917, and as the 14th and 16th Mayor of Fall River, Massachusetts.