The Maryland Democratic Party is among the oldest continuously existing political organizations in the world.

The first meeting of the Democratic (Jackson) Central Committee was held at the Atheneum in Baltimore, located on the southwest corner of St. Paul and Lexington streets.

On May 31, 1838, Maryland Democrats gathered in a state party convention to nominate William Grason for Governor.

[citation needed] After the ratification of the Suffrage Amendment in 1920, the Democratic State Central Committee added an equal number of women to its membership, a practice still embodied in National Party Rules and in the elections for Cecil County Democratic State Central Committee.

As of 2018 the Democrats only hold control in ten out of 23 Maryland's county governments in addition to Baltimore.