Brown and Seelye serves the following counties in Western Washington State:
- Clallam County
- Clark County
- Cowlitz County
- Grays Harbor County
- Island County
- Jefferson County
- King County
- Kitsap County
- Lewis County
- Mason County
- Pacific County
- Pierce County
- San Juan County
- Skagit County
- Skamania County
- Snohomish County
- Thurston County
- Wahkiakum County
- Whatcom County
