99chambers

Maryland State Senate seat · lines in effect since 2022

Maryland Legislative District 21

A district of about 148,000 people, 24% Hispanic and 34% Black, 45% of adults with a bachelor's degree. It votes D+57.5 relative to the nation for president.

Jim Rosapepe (D) · since Nov 7, 2006Next election Nov 5, 2030The 2026 race →

Where it sits among all 47 seats

Every Maryland State Senate 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+57.515th most
Democratic
Most DemocraticMost Republican24th seat · the majority lineDistrict 21

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 State SenateD+58.2D+67.6

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 47 seats. Small marks are other seats in Maryland. The black marker is District 21.

Adults with a bachelor's degree45% 54th pct · 22nd of 47 in MD

Higher than 54% of seats.

White adults without a degree13% 37th pct · 30th of 47 in MD

Lower than 63% of seats.

Hispanic residents24% 87th pct · 7th of 47 in MD

Higher than 87% of seats.

Black residents34% 70th pct · 15th of 47 in MD

Higher than 70% of seats.

Asian residents9% 80th pct · 10th of 47 in MD

Higher than 80% of seats.

People per square mile2,167 61st pct · 19th of 47 in MD

Denser than 61% 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 19
28% Hispanic · 51% college gradsD+51.2Held DDistrict 46
27% Black · 52% college gradsD+64.4Held DDistrict 20
23% Hispanic · 32% BlackD+74.8Held DDistrict 14
28% Black · 57% college gradsD+46.0Held D

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. Jim Rosapepe (D)
    2023– · Won 2022 by 58.2, 2026 by 67.6

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