John Leicester Sehon (June 9, 1862 – May 18, 1913) was an American Democratic politician from California.

In 1905 an "anti-boss" mood with San Diego voters caused them to defeat the Republican candidate and elect retired Captain Sehon, of the Democratic and Independent coalition, as mayor of San Diego, California, which he served until 1907.

During his campaign he emphasized the idea that the public owned the water supply and was a leader in a reform movement in his previous service in the city council.

After a public campaign against prostitution by many prominent citizens, Sehon gave the order in November 1912 to close the "Stingaree District".

[3][4] He died in San Diego on May 18, 1913, and is buried at Mount Hope Cemetery.