| Gladys Phillips | |
| State: | Washington |
| State House: | Washington |
| District: | 21st |
| Term Start: | January 8, 1951 |
| Term End: | January 12, 1953 |
| Alongside: | Harold B. Kellogg Elmer Huhta |
| Predecessor: | Arthur L. Callow Andrew Winberg Grace Kelley |
| Successor: | Elmer Huhta John K. Yearout Harry S. Elway, Jr. |
| Birth Date: | 1912 |
| Birth Place: | Aberdeen, Washington, U.S. |
| Party: | Republican |
| Spouse: | Lester "Pinky" O'Day |
| Education: | University of Washington (B.A., J.D.) |
| Occupation: | Attorney |
Gladys Phillips (1912 – March 26, 2000) was an American politician who served as a member of the Washington House of Representatives from 1951 to 1953. She represented Washington's 21st legislative district as a Republican.
Phillips was the daughter of Ernestine and James Marston Phillips. Her father was an attorney and politician who served as mayor of the family's home town of Aberdeen, Washington; a Washington State legislator; and eventually a judge in superior court for Grays Harbor County.
She attended University of Washington for both her bachelor's and law degrees, graduating as one of six women in the University of Washington School of Law class of 1935. In 1947, she married Lester "Pinky" O'Day, an insurance agent.
She served only one term in the legislature, later telling The Daily World that she "didn't care for the legislature" because it "didn't matter how hard you worked", and that she went to the legislature to work, but found that "[t]here was all kinds of monkey business up there."
For over sixty years, she ran a prominent law firm in Aberdeen.