| Charles Wadleigh Eldridge | |
| Office: | Seventeenth Mayor of Somerville, Massachusetts |
| Term Start: | January 7, 1918 |
| Term End: | January 1922 |
| Office2: | Member of the Massachusetts Senate Third Middlesex District |
| Term Start2: | January 1914 |
| Term End2: | January 1918 |
| Successor2: | Joseph O. Knox |
| Office3: | Member of the Massachusetts House of Representatives Twenty Sixth Middlesex District |
| Term Start3: | 1911 |
| Term End3: | 1913 |
| Office4: | Member of the Somerville, Massachusetts Board of Aldermen |
| Term Start4: | 1907 |
| Term End4: | 1910 |
| Birth Date: | October 16, 1877 |
| Nationality: | American |
| Spouse: | Edith L. |
| Children: | Raymon W. Eldridge; Arthur F. Eldridge; Warren P. Eldridge; Louise Eldridge;Charlotte Eldridge |
Charles Wadleigh Eldridge (October 16, 1877 – May 15, 1965) was a Massachusetts businessman and politician who served as a member in both the House and Senate of the Massachusetts legislature, as a member of the Board of Aldermen, and as the seventeenth Mayor of Somerville, Massachusetts.
Eldridge was a delegate to the 1920 Republican National Convention.
In addition to his duties as an officeholder, Eldridge also started working as a salesman for Chase & Sanborn in 1893.
Eldridge had married Edith, the daughter of Harriett J. Brown. Eldridge had five children: Raymon W. Eldridge, Arthur F. Eldridge, Warren P. Eldridge, Louise Eldridge, and Charlotte Eldridge.