New York State Senate District 4

State Legislative District Profile (Upper Chamber)

Overview

District ID
ny-sd-004
State
New York
Chamber
Upper chamber (state senate)
District Code
004
Land Area
70.2 sq mi
Water Area
0.09 sq mi

Boundary

Boundary of New York State Senate District 4

Boundary as GeoJSON

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

Counties

CountyOverlapShare of district landShare of county land
Suffolk County70.25 sq mi100.0%7.7%

Showing all 1 county

Places

PlaceOverlapShare of district landShare of place land
Brentwood CDP10.95 sq mi15.6%100.0%
East Farmingdale CDP7.48 sq mi10.6%100.0%
Central Islip CDP6.75 sq mi9.6%94.3%
Deer Park CDP6.17 sq mi8.8%100.0%
West Babylon CDP5.56 sq mi7.9%65.8%
Hauppauge CDP4.94 sq mi7.0%48.4%
Bay Shore CDP3.93 sq mi5.6%69.2%
North Babylon CDP3.30 sq mi4.7%100.0%
North Bay Shore CDP3.20 sq mi4.6%100.0%
Islip CDP2.72 sq mi3.9%57.4%
North Amityville CDP2.36 sq mi3.4%100.0%
Baywood CDP2.29 sq mi3.3%100.0%
Wyandanch CDP2.17 sq mi3.1%100.0%
North Lindenhurst CDP1.72 sq mi2.4%89.0%
Islandia village1.59 sq mi2.3%71.7%
West Islip CDP1.58 sq mi2.3%26.0%
Wheatley Heights CDP1.32 sq mi1.9%100.0%
Copiague CDP0.80 sq mi1.1%25.9%
Lindenhurst village0.53 sq mi0.8%14.2%
Amityville village0.48 sq mi0.7%23.3%
Brightwaters village0.29 sq mi0.4%30.5%
North Great River CDP0.10 sq mi0.1%4.3%
West Bay Shore CDP0.00 sq mi<0.1%<0.1%

Showing all 23 places

Overlapping Congressional Districts

Congressional districtPopulation in bothShare of this district's populationShare of the congressional district's populationShare of this district's land
NY District 2324,787100.0%41.8%100.0%

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

Voters

Registered Voters
202,528
Active Voters
196,326 (96.9%)

Party Registration

PartyVotersShare
Democratic88,60843.8%
Republican43,66621.6%
Unaffiliated00.0%
Other parties8,9924.4%
No party recorded61,26230.2%

Turnout by Cycle

CycleGeneralDemocratic PrimaryRepublican Primary
2025–202631,986 (15.8%)18 (0.0%)281 (0.1%)
2023–2024119,047 (58.8%)2,005 (1.0%)1,696 (0.8%)
2021–202275,786 (37.4%)9,588 (4.7%)6,935 (3.4%)
2019–2020116,006 (57.3%)17,388 (8.6%)4,822 (2.4%)
2017–201879,514 (39.3%)15,502 (7.7%)2,292 (1.1%)
2015–201693,926 (46.4%)18,442 (9.1%)8,828 (4.4%)
2013–201439,395 (19.5%)4,058 (2.0%)1,241 (0.6%)
2011–201272,202 (35.7%)1,527 (0.8%)1,691 (0.8%)

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 01/05/2026. These are registered voters, separate from the Census population figures. Counts under 10 are suppressed and shown as "<10".

Demographics

Total Population
329,895 (± 4,359)
Median Age
37.6
Median Household Income
$125,083 (± $2,903)
High School Graduate or Higher (age 25+)
80.8%
Bachelor's Degree or Higher (age 25+)
26.2%

Population by Age

GroupPeopleShare
Under 1876,23723.1%
18 to 64209,90863.6%
65 and over43,75013.3%

Population by Race and Hispanic Origin

GroupPeopleShare
Hispanic or Latino (any race)149,11345.2%
White, not Hispanic100,65430.5%
Black, not Hispanic52,99316.1%
Asian, not Hispanic13,9134.2%
American Indian / Alaska Native, not Hispanic6260.2%
Native Hawaiian / Pacific Islander, not Hispanic500.0%
Some other race, not Hispanic3,6111.1%
Two or more races, not Hispanic8,9352.7%

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
282,655
Citizen Voting Age Population (CVAP)
211,867

Citizen Population by Race/Ethnicity

GroupCitizensShare
Non-Hispanic172,08660.9%
Hispanic110,56839.1%
White101,99036.1%
Black51,68118.3%
Asian12,0154.3%
American Indian / Alaska Native6150.2%
Native Hawaiian / Pacific Islander500.0%
Two or More Races1,4470.5%

Citizen Voting Age Population by Race/Ethnicity

GroupCVAPShare
Non-Hispanic139,41965.8%
Hispanic72,44834.2%
White86,40640.8%
Black42,17619.9%
Asian9,0734.3%
American Indian / Alaska Native1,4880.7%
Native Hawaiian / Pacific Islander530.0%
Two or More Races9370.4%

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