| State House: | Washington |
| District: | 31st |
| Term Start: | January 10, 2011 |
| Term End: | January 12, 2015 |
| Preceded: | Dan Roach |
| Succeeded: | Drew Stokesbary |
| Cathy Dahlquist | |
| Birth Date: | 22 October 1960 |
| Party: | Republican |
| Alma Mater: | University of Alabama, Tuscaloosa |
Catherine C. Dahlquist (born October 22, 1960) is an American politician who served as a member of the Washington House of Representatives, representing the 31st district from 2011 to 2015.[1] A member of the Republican Party, she was a candidate for the Washington State Senate in 2014, losing in the primary.