Washington High School has varsity and JV men’s and women’s swimming teams.
Men’s Swimming
Head varsity coach: Matt Sinnott
Head JV and assistant varsity coach: Randy Ironside
Assistant varsity coach: Nick Gearhart
Volunteer assistant coach: Chris Tyler
Women’s Swimming
Head varsity coach: Megan Lewis
Assistant Coach Laurel Cruse
Assistant Coach Shannon Kelley
Volunteer Coach Hunter Smith
Diving Coach Megan Norris
Men’s Swimming Records
| Event | Varsity Team | Times/Score | Year | Frosh Team | Times/Score | Year |
| 200 Medley Relay | P. Visser, Kolsrud J.Taylor, Phelan | 1:33.95 | 2006 | Weberg, Kolsrud J. Taylor, P. Visser | 1:41.87 | 2004 |
| 200 Free | Cameron Kelley | 1:39.50 | 2016 | Cameron Kelley | 1:42.90 | 2015 |
| 200 IM | Nick Saulnier | 1:49.80 | 2016 | Mariusz Siembida | 1:55.23 | 1992 |
| 50 Free | Ryan Phelan | 20.81 | 2008 | B.J. Kolsrud | 20.90 | 2004 |
| Diving 11 | Kent Ferguson | 590.85 | 1981 | Kent Ferguson | 510.25 | 1979 |
| 100 Fly | Mats McGrath | 50.54 | 2021 | Jared Thorson | 51.83 | 2013 |
| 100 Free | Ryan Phelan | 46.07 | 2008 | George Durin | 47.48 | 2016 |
| 500 Free | Cameron Kelley | 4:29.96 | 2016 | Cameron Kelley | 4:35.79 | 2015 |
| 200 Free Relay | P. Visser, Kolsrud J.Taylor, Phelan | 1:24.65 | 2006 | Weberg, P. Visser Kolsrud, J. Taylor | 1:30.13 | 2004 |
| 100 Back | Nick Saulnier | 49.54 | 2016 | Mariusz Siembida | 51.60 | 1992 |
| 100 Breast | Chris Cruise | 57.26 | 1989 | B.J. Kolsrud | 58.49 | 2004 |
| 400 Free Relay | Kelley, Durin Donels, Throndson | 3:10.23 | 2017 | Roberton, Johnson T. DeBoom, R. Mitvalsky | 3:19.68 | 1987 |
| Diving 6 | Kent Ferguson | 382.35 | 1980 | Kent Ferguson | 332.70 | 1979 |