Maryland State Senate District 12

State Legislative District Profile (Upper Chamber)

Overview

District ID
md-sd-012
State
Maryland
Chamber
Upper chamber (state senate)
District Code
012
Land Area
43.4 sq mi
Water Area
0.66 sq mi

Boundary

Boundary of Maryland State Senate District 12

Boundary as GeoJSON

Source: U.S. Census Bureau TIGER/Line state legislative district boundaries.

Counties

CountyOverlapShare of district landShare of county land
Howard County27.65 sq mi63.8%11.0%
Anne Arundel County15.70 sq mi36.2%3.8%

Showing all 2 counties

Places

PlaceOverlapShare of district landShare of place land
Columbia CDP11.16 sq mi25.7%34.9%
Ilchester CDP9.78 sq mi22.6%91.0%
Glen Burnie CDP7.33 sq mi16.9%42.3%
Elkridge CDP5.62 sq mi13.0%67.2%
Brooklyn Park CDP4.21 sq mi9.7%100.0%
Linthicum CDP1.64 sq mi3.8%29.9%
Ellicott City CDP1.10 sq mi2.5%3.7%
Ferndale CDP0.67 sq mi1.5%16.9%

Showing all 8 places

Overlapping Congressional Districts

Congressional districtPopulation in bothShare of this district's populationShare of the congressional district's populationShare of this district's land
MD District 3131,694100.0%17.1%100.0%

Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).

Voters

Registered Voters
96,529
Active Voters
91,343 (94.6%)

Party Registration

PartyVotersShare
Democratic50,09351.9%
Republican18,90219.6%
Unaffiliated25,63226.6%
Other parties1,9022.0%
No party recorded00.0%

Turnout by Cycle

CycleGeneralDemocratic PrimaryRepublican Primary
2023–202464,988 (67.3%)0 (0.0%)0 (0.0%)
2021–202242,869 (44.4%)0 (0.0%)0 (0.0%)
2019–202059,844 (62.0%)20,729 (21.5%)5,320 (5.5%)
2017–201843,590 (45.2%)11,274 (11.7%)2,481 (2.6%)
2015–201648,373 (50.1%)17,070 (17.7%)6,398 (6.6%)
2013–201428,532 (29.6%)8,379 (8.7%)2,336 (2.4%)
2011–201241,626 (43.1%)5,334 (5.5%)2,718 (2.8%)

Turnout counts today's registered voters with a counted ballot in the cycle's elections (the odd and even year), as a share of today's registered voters. Voters who have since left the rolls are not counted.

Browse the voter list for this district (premium access; sign-in required)

Source: Civitech voter file snapshot as of 12/01/2025. These are registered voters, separate from the Census population figures. Counts under 10 are suppressed and shown as "<10".

Demographics

Total Population
129,731 (± 2,964)
Median Age
39.3
Median Household Income
$117,054 (± $3,565)
High School Graduate or Higher (age 25+)
92.7%
Bachelor's Degree or Higher (age 25+)
50.0%

Population by Age

GroupPeopleShare
Under 1827,21921.0%
18 to 6483,03664.0%
65 and over19,47615.0%

Population by Race and Hispanic Origin

GroupPeopleShare
Hispanic or Latino (any race)13,89810.7%
White, not Hispanic61,20347.2%
Black, not Hispanic31,66324.4%
Asian, not Hispanic14,08910.9%
American Indian / Alaska Native, not Hispanic970.1%
Native Hawaiian / Pacific Islander, not Hispanic280.0%
Some other race, not Hispanic3770.3%
Two or more races, not Hispanic8,3766.5%

Source: U.S. Census Bureau, American Community Survey 2020-2024 ACS 5-year estimates (tables B01001, B01002, B01003, B03002, B15003, B19013) for this state legislative district. Estimates are survey-based; ± figures are 90% margins of error.

Citizen Voting Age Population

Total Citizen Population
121,422
Citizen Voting Age Population (CVAP)
94,719

Citizen Population by Race/Ethnicity

GroupCitizensShare
Non-Hispanic110,80191.3%
Hispanic10,6238.7%
White61,43350.6%
Black30,60125.2%
Asian11,5259.5%
American Indian / Alaska Native990.1%
Native Hawaiian / Pacific Islander270.0%
Two or More Races9390.8%

Citizen Voting Age Population by Race/Ethnicity

GroupCVAPShare
Non-Hispanic87,94492.8%
Hispanic6,7777.2%
White51,97454.9%
Black24,96026.4%
Asian10,01110.6%
American Indian / Alaska Native7780.8%
Native Hawaiian / Pacific Islander280.0%
Two or More Races4570.5%

Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).