† Citizen voting-age population estimated for prior cycles; 2004 predates the ACS and is extrapolated. Source: ACS 5-year, table B05003.
——
D+60R+60
20042024
Boundary by 2024 margin · Precinct returns · VEST · MIT Election Lab
People and households
Who lives here
Exact values for this place, its state, and the United States.
Race · ethnicity · ancestry
Communities and origins
GroupCentral IslipNew YorkUnited States
Salvadoran13.8%0.9%0.7%
Puerto Rican11.9%5.1%1.8%
Dominican6.9%4.6%0.7%
Ecuadorian5.5%1.6%—
Mexican4.2%2.5%11.3%
Colombian4.2%0.9%0.4%
Guatemalan2.8%0.5%0.5%
Honduran2.8%0.3%0.3%
African American†11.4%8.0%9.9%
Haitian2.4%0.9%0.3%
Jamaican1.9%1.6%0.4%
Guyanese0.8%0.7%—
African0.5%0.6%0.5%
Trinidadian and Tobagonian0.5%0.4%—
Italian7.3%10.9%4.8%
Irish5.8%10.5%9.4%
German3.9%8.6%12.5%
English1.5%5.6%9.5%
Polish1.4%3.9%2.2%
American1.4%4.2%5.3%
Russian0.5%1.2%—
Greek0.4%——
Asian Indian0.5%1.9%1.4%
Chinese0.4%3.6%1.3%
Pakistani0.2%0.4%—
Filipino0.2%0.6%0.9%
Hispanic or Latino counts residents of any race; the race groups count only their non-Hispanic residents, so the groups are mutually exclusive and sum to 100%. Expand a row to see ancestries reported within that group.
Age and life stage
Measure
Central Islip
New York
United States
Median age
34.6
39.9
39.1
Age 18–24
10.5%
9.0%
9.2%
Age 65 and older
11.6%
18.0%
17.2%
Household economy
Measure
Central Islip
New York
United States
Median household income
$113,707
$85,974
$84,427
Poverty rate
9.2%
14.0%
12.5%
Bachelor's degree or higher (25+)
19.3%
40.0%
35.6%
Languages at home
Measure
Central Islip
New York
United States
Speaks a non-English language at home
61.8%
30.9%
22.3%
Spanish
56.5%
14.8%
13.6%
French (incl. Cajun & Haitian)
2.0%
1.5%
0.7%
Other Indo-European
1.6%
4.0%
2.0%
Religious landscape
Measure
Central Islip
New York
United States
Catholic
—
30.8%
18.6%
Evangelical Protestant
—
5.1%
16.5%
Unclaimed / not counted
—
48.7%
51.5%
American Community Survey 2024 5-year (CVAP, income, age, poverty, education, language, race, ancestry) · presidential returns from MIT Election Lab through 2024 · 2020 U.S. Religion Census (ASARB) — congregational adherents; unclaimed is the residual not counted by congregations.
Central Islip, New York
presidential history
Presidential margin, 2004–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
2004
+49.9%
2008
+53.9%
2012
+61.0%
2016
+51.0%
2020
+49.5%
2024
+24.6%
DemocraticRepublican
6 presidential elections
Third column names the leading third-party or independent finisher. Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024). Swing · margin change from the prior cycle. vs U.S. · margin relative to the national result that year. Third-party votes in 2012 are allocated from certified county totals by this place's share of each county's two-party vote — that cycle's precinct source records two-party splits. † 2004 sub-county results are estimated: the source's block-level detail for this cycle was unreliable — either county/municipality-level consolidated reporting (COVID-era) or a precinct-to-block allocation that misplaced votes — so the figures are allocated from the constituent county totals in proportion to the place and scaled to certified totals.
Year
Won
Democratic
Republican
Other
Margin
Swing
vs U.S.
Total
D
61.9%Harris6,586
37.2%Trump3,965
0.9%
D+24.6
R+24.8
D+26.1
10,645
D
74.2%Biden8,109
24.8%Trump2,705
1.0%
D+49.5
R+1.5
D+45.0
10,925
D
74.0%Clinton7,255
23.1%Trump2,260
2.9%
D+51.0
R+10.1
D+48.9
9,799
D
79.8%Obama7,378
18.8%Romney1,738
1.4%
D+61.0
D+7.1
D+57.2
9,241
D
76.4%Obama7,419
22.5%McCain2,186
1.1%
D+53.9
D+4.0
D+46.6
9,710
D
73.8%Kerry6,759
23.9%Bush2,191
2.3%
D+49.9
—
D+52.3
9,157
Central Islip's population is roughly 70% Hispanic, with deep roots in Central American migration, making it one of the most demographically distinct communities in Suffolk County and a bellwether for Latino turnout trends on Long Island.
Across the recorded series it reached a Democratic high of 61.0 points in 2012. Between 2020 and 2024 the city moved 24.8 points toward the Republican candidate; the 2024 margin was 24.6 points.
A population of 38,373, a 16% non-Hispanic-white share, and a median household income of $113,707 describe the city. The city's voting pattern over the last decade is most similar to that of North Bay Shore and Lawrence.
Akashic
Political twins — cities
The cities whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Twin score (0–100) = weighted cosine between tier-standardized fingerprints: presidential margins 2000–2024 with 12-yr trend and elasticity, ACS income, age, education, population and race, top reported ancestries, and religious adherence — chips name the closest-shared dimensions and the widest gap. Re-weight the groups in the twins explorer.
In 2024, Central Islip, New York voted Democratic by 24.6 points (D+24.6), carried by the Democratic candidate. Out of 10,645 votes cast, 6,586 went Democratic and 3,965 went Republican.
How many people live in Central Islip, New York?
Central Islip, New York has a population of 38,373 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Central Islip, New York?
Median household income in Central Islip, New York is $113,707 — above the national median of $80,734. The New York state median is $85,974.
What is the political history of Central Islip, New York?
Akashic tracks 6 presidential elections in Central Islip, New York from 2004 to 2024. Of those, 6 went Democratic and 0 went Republican.
