Jon Steven Cardin (born January 12, 1970) is an American politician who has served as a member of the Maryland House of Delegates representing District 11 since 2019, and previously from 2003 to 2015.

[2] After Cardin was admitted to the Maryland Bar in 2001, he clerked for Baltimore City Circuit Court Judge William D. Quarles Jr. until 2002.

[1] Cardin was first sworn into the Maryland House of Delegates on January 8, 2003, and was a member of the Ways and Means Committee during his entire first stint in office.

[2] During the 2014 legislative session, Cardin missed 75 percent of committee votes,[3] which he attributed to him leaving early to recognize Shabbat and to spend time with his daughter and pregnant wife.

[6] During the general election, Cardin was targeted by the Republican State Leadership Committee, who sent out flyers attacking him for voting for tax increases under the Martin O'Malley administration.

[9] In January 2020, the Baltimore County Democratic Central Committee voted to nominate Shelly Hettleman to fill the vacancy over Cardin.

[19] During the Democratic primary, Cardin was criticized for benefiting from political nepotism after campaigning with his uncle Ben Cardin,[19][20] for misusing Baltimore Police Department resources in a stunt wedding proposal, missing 75 percent of committee votes during the 2014 legislative session, and touting an endorsement from Ski Money, a Baltimore-based rapper who had been indicted on human trafficking charges in Baltimore County.

[24] Polling ahead of the primary election showed Cardin leading other Democratic challengers Frosh and Aisha Braveboy, but with a majority of voters saying that they were undecided.

[33] During the 2007 legislative session, Cardin introduced a bill requiring elementary schools to have 150 minutes of physical education classes a week.

[34] During the 2011 legislative session, Cardin introduced a bill that would allow campaign contributions to Maryland political candidates by text message.

[36] He also introduced a bill that would amend the Constitution of Maryland to appointed state judges serve 12-year terms before running in a retention election.

[44] In 2013, Cardin introduced Grace's Law, which would make harassing a child with the intent of encouraging them to commit suicide punishable by a fine and jail time.