Steven J. DeBoy Sr. (born January 2, 1956) is a Democratic member of the Maryland House of Delegates, serving since 2003.

Deboy graduated from the Baltimore County Police Academy in 1977.

He is a member of the Maryland Veterans Caucus, the Task Force on the Exemption of Law Enforcement Officers' Pensions from Taxation.

For the past four years, Delegate DeBoy has annually voted to support classroom teachers, public schools, police and hospitals in Baltimore and Howard Counties.

Since 2002, funding to schools across the State has increased 82%, resulting in Maryland being ranked top in the nation for K-12 education.