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
Three states were added to the union under Buchanan: Minnesota, Oregon and Kansas.
Thomas Jefferson was the Secretary of State during Washington's presidency.
Virginia
Burr