| Party: | Democratic |
| Alma Mater: | Minnesota State University (BA, BS) University of Washington (JD) |
| Profession: | Lawyer, jurist |
| Term Start: | July 1, 1998 |
| Term End: | March 31, 2022 |
| Marlin Appelwick | |
| Office1: | Minority Leader of the Washington House of Representatives |
| Term Start1: | January 8, 1996 |
| Term End1: | June 16, 1998 |
| Predecessor1: | Brian Ebersole |
| Successor1: | Frank Chopp |
| Predecessor: | Seat established |
| Successor: | Janet Chung |
| State House2: | Washington |
| District2: | 46th |
| Term Start2: | January 10, 1983 |
| Term End2: | June 16, 1998 |
| Predecessor2: | Irv Greengo |
| Successor2: | Brian Peyton |
| Birthname: | Marlin Jon Appelwick |
| Birth Date: | 2 July 1953 |
| Office: | Judge of the Court of Appeals of Washington, Division I |
Marlin Jon Appelwick (born July 2, 1953) was a judge of the Washington Court of Appeals, Division I, who served from 1998 until his retirement in 2022.
Judge Appelwick first ran for election to the Washington Court of Appeals in 1998.[1] He ran unopposed again in 2018 and retired from the court on March 31, 2022.[2] Before becoming a judge, Judge Appelwick practiced law for 18 years in family law, business law, and mediation.[3] Judge Appelwick was also a member of the Washington State Legislature for 16 years. He received both a BA and a BS in mathematics from the Minnesota State University, Mankato in 1976 and his JD from the University of Washington School of Law in 1979.