Constance von Stumm (née Hoyt; May 20, 1889 – July 30, 1923) was an American heiress who married into a German aristocratic family.

[4][5] Her paternal grandfather was Henry Martyn Hoyt, the Governor of Pennsylvania from 1879 to 1883.

[6] Her maternal grandfather was Col. Morton McMichael Jr.,[7] "one of the foremost citizens of Philadelphia" who was president of the First National Bank of Philadelphia and a son of Mayor Morton McMichael.

[1][8] On March 30, 1910, Constance married German diplomat, Baron Ferdinand Carl von Stumm (1880–1954) in Washington, D.C. in a ceremony attended by President William Howard Taft.

[14] The Baroness von Stumm committed suicide on July 30, 1923, at age 34, in Bavaria, Germany.