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Washington County, Oklahoma
Washington County
is a
county
located in the northeastern part of the
U.S. state
of
Oklahoma
. As of the
2010 census
, the population was 50,976. Its
county seat
is
Bartlesville
. Named for President
George Washington
, it is the smallest county in Oklahoma in total area, adjacent to the largest county in Oklahoma,
Osage County
.
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