| Ziba Cary Keith | |
| Office: | Member of the Massachusetts Executive Council First Councilor District |
| Term Start2: | 1892 |
| Term End2: | 1893 |
| Successor2: | John J. Whipple |
| Office3: | Member of the Massachusetts Senate Second Plymouth District |
| Term Start3: | 1887 |
| Term End3: | 1888 |
| Term Start4: | 1884 |
| Term End4: | 1884 |
| Predecessor4: | Henry H. Packard |
| Successor4: | John J. Whipple |
| Term Start5: | January 2, 1882 |
| Term End5: | 1883 |
| Predecessor5: | Board of Selectmen |
| Office6: | Member of the Brockton, Massachusetts Board of Selectmen |
| Term Start6: | 1875 |
| Term End6: | 1877 |
| Term Start7: | 1875 |
| Term End7: | 1877 |
| Birth Date: | July 13, 1842 |
| Death Place: | Brockton, Massachusetts |
| Spouse: | Abbie F. Jackson |
Ziba Cary Keith (13 July 1842 - 5 April 1909) was a Massachusetts businessman and politician who served in both houses of the Massachusetts Legislature, as the first, third, and seventh Mayor of Brockton, Massachusetts and as a member of the Massachusetts Executive Council.
Keith was born on July 13, 1842 in Brockton, Massachusetts when it was known as North Bridgewater, Massachusetts. Keith was educated in the local schools and at the Pierce Academy in Middleborough, Massachusetts.
Keith married Abbie F. Jackson, daughter of Oliver Jackson, on July 13, 1865.
In December 1881 Keith was elected the first mayor of Brockton, Massachusetts, he was sworn in on the first Monday in January 1882.
He died in 1909 after a short illness.[1]