Levi Ziegler Leiter (November 2, 1834 – June 9, 1904) was an American businessman based in Chicago.

[4] Although some have confused Leiter's ancestry as Jewish, his family was in fact of Swiss descent; he was raised a Lutheran.

As Leiter's wealth increased, he invested much of his savings in Chicago real estate.

After retirement from Field, Leiter & Co., he devoted his attention to real estate and corporate interests.

[11] Levi paid millions of dollars to settle Joseph's debts after the market crashed in 1898.

Together, they were the parents of:[13] Leiter died of heart disease at the Vanderbilt family cottage in Bar Harbor, Maine on June 9, 1904.

[21][22] Through his daughter Margaret, he was the maternal grandfather of Charles Howard, 20th Earl of Suffolk (1906–1941); Hon.