99chambers

Maryland State Senate seat · lines in effect since 2022

Maryland Legislative District 40

A district of about 126,000 people, 69% Black, 29% of adults with a bachelor's degree. It votes D+83.4 relative to the nation for president.

Antonio Hayes (D) · since Nov 6, 2018Next 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+83.43rd most
Democratic
Most DemocraticMost Republican24th seat · the majority lineDistrict 40

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.

2022
Maryland State SenateD+84.1

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 40.

Adults with a bachelor's degree29% 13th pct · 41st of 47 in MD

Lower than 87% of seats.

White adults without a degree9% 17th pct · 39th of 47 in MD

Lower than 83% of seats.

Hispanic residents5% 7th pct · 44th of 47 in MD

Lower than 93% of seats.

Black residents69% 93rd pct · 4th of 47 in MD

Higher than 93% of seats.

Asian residents3% 35th pct · 31st of 47 in MD

Lower than 65% of seats.

People per square mile8,785 100th pct · 1st of 47 in MD

Densest of 47 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 45
72% Black · 26% college gradsD+79.6Held DDistrict 41
60% Black · 35% college gradsD+69.0Held DDistrict 24
73% Black · 37% college gradsD+83.9Held DDistrict 25
78% Black · 33% college gradsD+87.7Held 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. Antonio Hayes (D)
    2023– · Won 2022 by 84.1, 2026 by 78.6

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