Five states were added to the Union during Washington's presidency - North Carolina (1789), Rhode Island (1790), Vermont (1791), Kentucky (1792), and Tennessee (1796).
No state entered the Union during Taylor's Presidency.
No- Eisenhower who served some 20 years before Reagan was the last to see a state added.
my state
Two states were added to the Union during Taft's term; New Mexico & Arizona.
Just one state was added to the US during the T Roosevelt Presidency. Oklahoma in 1907.
Maine
Frank B. Kellogg
Florida
During James Buchanan's presidency, one state, Kansas, was admitted to the Union in 1861.
Thomas Jefferson was the Secretary of State during Washington's presidency.
Virginia
Burr