99chambers

Maryland House of Delegates seat · lines in effect since 2022

Maryland Delegate District 42A

A district of about 48,000 people, 60% of adults with a bachelor's degree. It votes R+9.8 relative to the nation for president.

Alex Harlan (R)Next election Nov 5, 2030The 2026 race →

Where it sits among all 71 seats

Every Maryland House of Delegates seat by partisan lean, from most Democratic to most Republican. Lean is the seat's presidential vote on current lines, relative to the nation.

R+9.853rd most
Democratic
Most DemocraticMost Republican36th seat · the majority lineDistrict 42A

Source: 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET

Every race on these lines

Results recomputed from precinct returns as if today's boundaries had always existed, so years compare like for like.

202220242026
U.S. SenateNo raceR+34.7No race
Maryland House of DelegatesR+17.2No raceR+17.2

Outlined: the race for this seat itselfBlank: no race that year

Source: 99chambers results archive: precinct results allocated to current lines; 2026: civicAPIUpdated Nov 7, 2026, 3:01 PM ET

Who lives here, compared

Grey bars show the spread of all 71 seats. Small marks are other seats in Maryland. The black marker is District 42A.

Adults with a bachelor's degree60% 86th pct · 11th of 71 in MD

Higher than 86% of seats.

White adults without a degree34% 59th pct · 30th of 71 in MD

Higher than 59% of seats.

Hispanic residents3% 3rd pct · 69th of 71 in MD

Lower than 97% of seats.

Black residents4% 4th pct · 68th of 71 in MD

Lower than 96% of seats.

Asian residents2% 34th pct · 47th of 71 in MD

Lower than 66% of seats.

People per square mile210 13th pct · 62nd of 71 in MD

Less dense than 87% of seats.

Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current linesUpdated Oct 13, 2026, 5:06 AM ET

Seats most like this one

Nearest seats on demographics, density and lean.

District 4
47% college gradsR+6.0CountingDistrict 30B
44% college gradsR+7.8CountingDistrict 33B
60% college gradsD+9.0CountingDistrict 29C
40% college gradsR+14.2Counting

Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current lines; 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET

Who has held it

These lines took effect in 2022.

  1. Nino Mangione (R)
    2023– · Won 2022 by 17.2

Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)