Stephen W. Lafferty (born February 28, 1949) is an American politician who was a member of Maryland House of Delegates from January 2007 to September 2019, representing District 42 from 2007 to 2015, and District 42A from 2015 to 2019.

Lafferty was the first Democrat to be elected in district 42 since it was moved to Baltimore County after the 21st century census and redistricting.

[1] In September 2019, he resigned from the House of Delegates to serve as chief sustainability officer for Baltimore County Executive Johnny Olszewski.

also in American studies; and then a teacher's certificate at Towson State University in 1977.

[3] He was a teacher (mathematics & social studies) for Baltimore City Public Schools from 1974–1978.