99chambers

Maryland House of Delegates seat · lines in effect since 2022

Maryland Delegate District 12B

A district of about 47,000 people, 26% Black, 23% of adults with a bachelor's degree. It votes D+11.8 relative to the nation for president.

Gary Simmons (D) · since Nov 8, 2022Next 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.

D+11.845th most
Democratic
Most DemocraticMost Republican36th seat · the majority lineDistrict 12B

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.

20222026
Maryland House of DelegatesD+11.0D+26.0

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 12B.

Adults with a bachelor's degree23% 9th pct · 65th of 71 in MD

Lower than 91% of seats.

White adults without a degree43% 71st pct · 21st of 71 in MD

Higher than 71% of seats.

Hispanic residents15% 83rd pct · 13th of 71 in MD

Higher than 83% of seats.

Black residents26% 61st pct · 28th of 71 in MD

Higher than 61% of seats.

Asian residents4% 60th pct · 29th of 71 in MD

Higher than 60% of seats.

People per square mile2,892 69th pct · 23rd of 71 in MD

Denser than 69% 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 2B
MarylandD+9.6CountingDistrict 38B
26% Black · 33% college gradsD+7.9CountingDistrict 44A
24% Black · 34% college gradsD+21.9CountingDistrict 8
33% Black · 34% college gradsD+26.5Counting

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. Gary Simmons (D)
    2023– · Won 2022 by 11.0

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