Following is a list of the Sequim Irrigation Festival Grand Marshals. The Grand Marshals are selected by the Irrigation Festival membership. This list is a work in progress. If you have updates to this list, please email info@irrigationfestival.com.
| Year | Grand Marshal Name |
| 1970 | Yam Castillo |
| 1971 – 1973 | |
| 1974 | A. Ludlow Kramer |
| 1975 | Steve Edelman |
| 1976 | Harry Bowechop |
| 1977 | Donald Kendall |
| 1978 | Kay Gizinski |
| 1979 | Helen Haller Heimbaugh |
| 1980 | George & Ruth Mogan |
| 1981 | Virginia Peterson |
| 1982 | Bill & Katie Merrill |
| 1983 | Roby Trotter |
| 1984 | Harriet Fish |
| 1985 | Matt Dryke |
| 1986 | Lloyd & Katherine Beebe |
| 1987 | Chuck S. Southern |
| 1988 | James P. Dinan |
| 1989 | Richard Kaps |
| 1990 | Harold Sofie |
| 1991 | Myron Telerud |
| 1992 | |
| 1993 | Orum Medsker |
| 1994 | Ross Hamilton |
| 2008 | Tom Santos |
| 2009 | Jeri Smith |
| 2010 | Bob and Elaine Caldwell |
| 2011 | Emily Westcott |
| 2012 | Derrell Sharp |
| 2013 | Elaine Grinnell |
| 2014 | Gary and Jan Smith |
| 2015 | Joe and Tawana Borden |
| 2016 | Jim Stoffer |
| 2017 | Vern Fosket |
| 2018 | Dave McInnes |
| 2019 | Jaye Moore |
| 2020 | Phil Castell |
| 2021 | Amanda Beitzel |
| 2022 | Kim and Stephen Rosales |
| 2023 | Susan Baritelle |
| 2024 | Dr. Linda Allen |
| 2025 | Mike Dashiell |