Leslie Allison Stemmons (November 8, 1876 – October 15, 1939) was an influential businessman in Dallas, Texas.
Before returning to Dallas in 1900 to work selling fire insurance and real estate, Stemmons worked briefly in Chicago real estate.
In 1908 the Trinity River overflowed Commerce Street by 52.6 feet [conversion required], and the Ulrickson Committee was formed to draft a flood-control plan.
The plan involved moving the Trinity River channel one mile west and building a series of levees.
Stemmons died at his home in Dallas on October 15, 1939, and was buried in Oak Cliff Cemetery.