O'Brien, Washington

O'Brien, Washington
Flood in O'Brien (1906)
O'Brien
O'Brien
Coordinates: 47°24′44″N 122°14′13″W / 47.41222°N 122.23694°W / 47.41222; -122.23694
CountryUnited States
StateWashington
CountyKing
Time zoneUTC-8 (Pacific (PST))
  Summer (DST)UTC-7 (PDT)

O'Brien, Washington was a former community, north of Kent in the Green River Valley of King County in the U.S. state of Washington. It was just north of today's Green River Natural Resources Area, on the right bank of the river. At one time, it had a post office and a school.

The community was named after Terrance O'Brien, the original owner of the town site.