New Jersey State Senate District 18

State Legislative District Profile (Upper Chamber)

Overview

District ID
nj-sd-018
State
New Jersey
Chamber
Upper chamber (state senate)
District Code
018
Land Area
69.2 sq mi
Water Area
1.44 sq mi

Boundary

Boundary of New Jersey State Senate District 18

Boundary as GeoJSON

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

Counties

CountyOverlapShare of district landShare of county land
Middlesex County69.16 sq mi100.0%22.4%

Showing all 1 county

Places

PlaceOverlapShare of district landShare of place land
South Plainfield borough8.30 sq mi12.0%100.0%
Metuchen borough2.85 sq mi4.1%100.0%
South River borough2.78 sq mi4.0%100.0%
Highland Park borough1.82 sq mi2.6%100.0%
Milltown borough1.55 sq mi2.2%100.0%
Rutgers University-Livingston Campus CDP0.29 sq mi0.4%21.4%

Showing all 6 places

Overlapping Congressional Districts

Congressional districtPopulation in bothShare of this district's populationShare of the congressional district's populationShare of this district's land
NJ District 6162,04769.0%20.9%62.2%
NJ District 1272,87031.0%9.4%37.8%

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

Voters

Registered Voters
161,894
Active Voters
149,381 (92.3%)

Party Registration

PartyVotersShare
Democratic69,36342.8%
Republican29,81218.4%
Unaffiliated61,09037.7%
Other parties1,6291.0%
No party recorded00.0%

Turnout by Cycle

CycleGeneralDemocratic PrimaryRepublican Primary
2025–202682,912 (51.2%)27,735 (17.1%)8,215 (5.1%)
2023–2024104,980 (64.8%)21,970 (13.6%)6,889 (4.3%)
2021–202272,976 (45.1%)18,772 (11.6%)7,058 (4.4%)
2019–2020102,913 (63.6%)26,351 (16.3%)6,589 (4.1%)
2017–201870,414 (43.5%)14,856 (9.2%)4,065 (2.5%)
2015–201677,573 (47.9%)17,772 (11.0%)5,753 (3.6%)
2013–201446,649 (28.8%)10,441 (6.4%)3,514 (2.2%)
2011–201262,356 (38.5%)3,312 (2.0%)2,007 (1.2%)

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 01/02/2026. These are registered voters, separate from the Census population figures. Counts under 10 are suppressed and shown as "<10".

Demographics

Total Population
236,030 (± 62)
Median Age
39.9
Median Household Income
$128,696 (± $3,087)
High School Graduate or Higher (age 25+)
92.5%
Bachelor's Degree or Higher (age 25+)
55.6%

Population by Age

GroupPeopleShare
Under 1855,72223.6%
18 to 64142,89460.5%
65 and over37,41415.9%

Population by Race and Hispanic Origin

GroupPeopleShare
Hispanic or Latino (any race)31,33413.3%
White, not Hispanic93,35739.6%
Black, not Hispanic17,3247.3%
Asian, not Hispanic83,06735.2%
American Indian / Alaska Native, not Hispanic2020.1%
Native Hawaiian / Pacific Islander, not Hispanic790.0%
Some other race, not Hispanic2,5651.1%
Two or more races, not Hispanic8,1023.4%

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
198,328
Citizen Voting Age Population (CVAP)
147,112

Citizen Population by Race/Ethnicity

GroupCitizensShare
Non-Hispanic172,14186.8%
Hispanic26,19313.2%
White92,86346.8%
Black16,6258.4%
Asian57,16328.8%
American Indian / Alaska Native1990.1%
Native Hawaiian / Pacific Islander440.0%
Two or More Races1,0220.5%

Citizen Voting Age Population by Race/Ethnicity

GroupCVAPShare
Non-Hispanic130,00488.4%
Hispanic17,10711.6%
White74,34650.5%
Black13,4729.2%
Asian40,86027.8%
American Indian / Alaska Native8570.6%
Native Hawaiian / Pacific Islander450.0%
Two or More Races6510.4%

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