| Robert Ridder | |
| State Senate: | Washington |
| District: | 35th |
| Term Start: | January 9, 1967 |
| Term End: | July 19, 1973 |
| Predecessor: | James E. Kennett |
| Successor: | Ruthe Ridder |
| Birth Date: | 25 February 1927 |
| Birth Place: | Bellingham, Washington, U.S. |
| Death Place: | Rainier Beach, Seattle, Washington, U.S. |
| Party: | Democratic |
| Spouse: | Ruthe Ridder |
Robert C. Ridder (February 25, 1927 – May 25, 2021)[1] was an American educator and politician in the state of Washington. Ridder served in the Washington State Senate as a Democrat from the 35th District from 1967 to 1973. He attended the University of Washington and earned a Bachelor of Science degree, and completed graduate studies. He was later an educator, serving as a vice principal of a junior high school (Showalter Junior High - Tukwila, WA). He retired from his Senate seat in 1973 and was succeeded by his wife, Ruthe.[2] [3]