Washington state joined the Union on November 11, 1889, becoming the 42nd state to do so. The first state was Delaware.
Washington, D.C. is not a state and therefore never "entered the union". The city was established by Congress on July 16, 1790.
November 11, 1889
Washington was admitted into the Union on November 11, 1889 becoming the 42nd state to join the Union.
Washington was admitted into the Union on November 11, 1889 becoming the 42nd state to join the Union.
In 1889, it was the 42nd state to join the union.
Washington was admitted into the Union on November 11, 1889 becoming the 42nd state to join the Union.
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Washington was admitted into the Union on November 11, 1889 becoming the 42nd state to join the Union.
Washington was admitted into the Union on November 11, 1889 becoming the 42nd state to join the Union.
Washington was admitted into the Union on November 11, 1889 becoming the 42nd state to join the Union.
Washington was admitted into the Union on November 11, 1889 becoming the 42nd state to join the Union.
Kentucky was the 15th state to join the Union and did so in 1792.
Washington was admitted into the Union on November 11, 1889 becoming the 42nd state to join the Union.
Washington was admitted into the Union on November 11, 1889 becoming the 42nd state to join the Union.