Maryland's Legislative District 42 is one of 47 districts in the state for the Maryland General Assembly.

It covers part of Baltimore County.

[1] As of the 2020 United States census, the district had a population of 130,396, of whom 105,099 (80.6%) were of voting age.

The racial makeup of the district was 95,427 (73.2%) White, 15,877 (12.2%) African American, 317 (0.2%) Native American, 8,497 (6.5%) Asian, 21 (0.0%) Pacific Islander, 2,244 (1.7%) from some other race, and 7,991 (6.1%) from two or more races.

[2][3] Hispanic or Latino of any race were 6,275 (4.8%) of the population.