The Learjet 25 is an American ten-seat, twin-engine, high-speed business jet aircraft manufactured by Learjet. It is a stretched version of the Learjet 24.

Learjet was a manufacturer of business jets for civilian and military use based in Wichita, Kansas, United States. Founded in the late 1950s by William Powell Lear as Swiss American Aviation Corporation, it became a subsidiary of Canadian Bombardier Aerospace in 1990, which marketed the company’s aircraft as the "Bombardier Learjet Family". The 3,000th Learjet was delivered in June 2017. The Learjet line was once sufficiently popular that the Learjet name became synonymous and interchangeable with the terms business jet or private jet in the popular vernacular. In February 2021, Bombardier announced the end of production for all new Learjet aircraft in 2021, with the continuation of support and maintenance for aircraft currently in service.