Who was president during the decade?

== == Woodrow Wilson from the beginning of the 20's until March 4, 1921.

Warren Harding from March 4, 1921 until his death on August 2, 1923.

August 2, 1923 -March 4, 1929 Calvin Coolidge

Herbert Hoover from March 4. 1929 through the end of the twenties.