D'wamish Post Office is established December 7, 1860. David A. Neely is appointed postmaster and will be the only postmaster to serve. The post office closes on August 30, 1864.
The post office was located within the present city limits of Kent on the east side of Green River in the vicinity of South 224th Street. Kent is located in King County about 15 miles southeast of Seattle. By the time the town incorporated in 1890, it was a farming community with hop growing at the center of its economy.