Leach is an unincorporated community and census-designated place (CDP) in southwestern Delaware County, Oklahoma, United States, along U.S. Route 412 and 412 Alternate.

[5] On May 20, 2019, a nocturnal EF2 tornado was reported to have caused extensive damage in the vicinity of Leach.

According to the United States Census Bureau, the Leach CDP has a total area of 5.8 square miles (14.9 km2), all land.

The racial makeup of the CDP was 48.64% White, 40.45% Native American, and 10.91% from two or more races.

The nearby town of Kansas, Oklahoma is the home of Born Again Pews, a church furniture manufacturing company.