John Simon Guggenheim (December 30, 1867 – November 2, 1941) was an American businessman, politician and philanthropist.

[4] In 1907, Simon Guggenheim was elected as a Republican to the United States Senate, representing Colorado from 1907 to 1913.

[6] After moving to Denver in 1892, Guggenheim married Olga Hirsch on November 24, 1898, at the Waldorf Astoria New York in Manhattan.

To celebrate their marriage, the Guggenheims provided a Thanksgiving dinner to 5,000 poor Manhattan children.

In 1939, the Guggenheims' second son, George, committed suicide in a Manhattan hotel at the age of 32.