| John S. Cate | |
| Birth Date: | March 25, 1839 |
| Birth Place: | Tamworth, New Hampshire |
| Death Date: | October 11, 1906 (aged 67) |
| Death Place: | West Ossipee, New Hampshire |
| Nationality: | American |
| Term Start: | 1897 |
| Term End: | 1898 |
| Predecessor: | John D. Henderson |
| Successor: | Francis E. Dyer |
| Term Start2: | 1895 |
| Term End2: | 1896 |
| Predecessor2: | Francis Batchedler |
| Successor2: | John D. Henderson |
| Term Start3: | 1887 |
| Term End3: | 1889 |
| Predecessor3: | Frank P. Bennett |
| Successor3: | Charles H. Spencer |
| Term Start4: | 1890 |
| Term End4: | 1890 |
| Predecessor4: | Joseph H. Cannell |
John S. Cate (March 25, 1839 – October 11, 1906) was an American business executive and politician who served as a member of the Massachusetts House of Representatives, a member of the Board of Selectmen, and as Mayor of Everett, Massachusetts.
Cate was born on March 25, 1839, in Tamworth, New Hampshire.
Cate was engaged in the manufacture of roofing materials, and was also involved in the real estate business.
From 1887 to 1889 Cate served as a member of the Everett, Massachusetts Board of Selectmen. In 1889 Cate was elected as a Republican, (over Independent Republican Thomas Leavitt who had earlier lost the Republican nomination to Cate), to the Massachusetts House of Representatives. In the legislature of 1899 Cate served on the Committee on Street Railways.
Cate died, on October 11, 1906, at his summer home in West Ossipee, New Hampshire.