Template:WashingtonBlockhouses
| No. | Name | Located | Source | Notes |
|---|---|---|---|---|
| 1 | Fort at Cowlitz Landing | Cowlitz Landing | {{{Source}}} | Stockaded |
| 1 | Unknown | French settlement, near Cowlitz Farms | {{{Source}}} | Stockaded |
| Sources: Whiting, J.S., Forts of the State of Washington: A record of Military and Semi-Military Establishments Designated as Forts, Kelly Printing Company, Seattle, Second Edition, 1951, page 4-11 | ||||