What is the population of Central Islip CDP?

Central Islip CDP has 37,751 residents on Census ACS 2019-2023 ACS 5-year estimates, ranking #26 of 1,292 in New York.

What is the median household income in Central Islip CDP?

Median household income in Central Islip CDP is $110,166 a year, 40.3% above the national figure of $78,538.

How much does it cost to rent or buy in Central Islip CDP?

Median gross rent is $2,106 a month and the median home value is $405,000, so rent absorbs about 22.9% of median household income.

Is Central Islip CDP affordable compared with the rest of the US?

Homes cost about 3.7× the local median income here versus roughly 3.9× nationally, so Central Islip CDP is more affordable to buy in than the typical US market, and rent takes 22.9% of median income against the 30% cost-burden line.

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New York · Census place 13552

Central Islip, NY population, income and ZIP codes

Quick answer

The population of the city of Central Islip, New York (Central Islip, NY — Census place “Central Islip CDP”) is 37,751 residents, ranking #26 of 1292 places in New York. Median household income is $110,166, the median home is worth $405,000 and median gross rent runs $2,106 a month. Looking for the Central Islip New York ZIP code list? 2 ZIP codes serve Central Islip, NY: 11722, 11752.

Population: 37,751Central Islip CDP residents
Median household income: $110,166Past 12 months, inflation adjusted
Median home value: $405,000Owner-occupied units
Median gross rent: $2,106Rent plus utilities, monthly
Median age: 33.9 yrsAll residents
Homeownership rate: 77.1%Owner-occupied households

Central Islip ZIP codes (New York)

Census ZCTAs whose delivery area overlaps Central Islip.

The Central Islip NY ZIP code list below covers 2 ZIP codes. Open any one for its population, income, housing and rent profile.

What the numbers mean in Central Islip CDP

Housing cost measured against local earnings.

A household earning the Central Islip CDP median would spend about 22.9% of gross income on the median rent. The 30% mark is the federal threshold for cost burden, so anything above it signals a stretched rental market. The median home costs 3.7× the median household income; nationally that ratio sits near 4.5×. Poverty affects 9.3% of residents and 77.1% of households own their home.

Source: US Census Bureau, ACS 2019-2023 5-year estimates · rates as published for 2019-2023 ACS 5-year

Central Islip CDP, NY in context

How this area compares with national benchmarks.

Central Islip CDP is a small city in New York, with 37,751 residents counted in the Census American Community Survey 2019-2023 ACS 5-year estimates, which places it #26 of 1,292 ranked by population — larger than 98% of them. The median age here is 33.9 years against 39.1 nationally, a slightly younger profile than the country as a whole. Places under 65,000 residents only appear in the five-year release, never the one-year file, so these values pool sixty months of responses and lag the current year by design.

Households in Central Islip CDP earn a median of $110,166 a year, 40.3% above the national figure of $78,538 and 20% above the $91,806 median for the 847 New York cities we cover. Household income here is measured before tax and pooled across everyone at the address, which is why it reads higher than typical individual earnings in the same area. Poverty reaches 9.3% of residents here, below the 12.4% national rate.

The typical owner-occupied home in Central Islip CDP is valued at $405,000, 33.5% above the national figure and 28% above the $315,800 peer median, while median gross rent runs $2,106 a month, 49.8% above the national figure, or roughly $25,272 across a full year. A household on the local median income would put about 22.9% of gross pay toward that rent against the federal 30% cost-burden threshold, so renting here is within the standard affordability guideline. The home-price-to-income ratio works out to 3.7×, against roughly 3.9× nationally, so buying is easier here than in the average US market. 77.1% of occupied homes are owner-occupied versus 65% nationally, so the market leans toward owners. Rent is reported gross — contract rent plus tenant-paid utilities — which is why it runs above the advertised price on a listing for the same unit.

All values below were released by the Census for this exact geography, with no gap-filling on our side. Small-area estimates still carry wider margins of error than state or national figures, so check the linked ACS tables before relying on them for lending, appraisal or legal work.

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Frequently asked questions

Common questions about this area.

What is the population of Central Islip CDP?: Central Islip CDP has 37,751 residents on Census ACS 2019-2023 ACS 5-year estimates, ranking #26 of 1,292 in New York.
What is the median household income in Central Islip CDP?: Median household income in Central Islip CDP is $110,166 a year, 40.3% above the national figure of $78,538.
How much does it cost to rent or buy in Central Islip CDP?: Median gross rent is $2,106 a month and the median home value is $405,000, so rent absorbs about 22.9% of median household income.
Is Central Islip CDP affordable compared with the rest of the US?: Homes cost about 3.7× the local median income here versus roughly 3.9× nationally, so Central Islip CDP is more affordable to buy in than the typical US market, and rent takes 22.9% of median income against the 30% cost-burden line.
How current is this Central Islip CDP data?: All figures come from the US Census Bureau American Community Survey 2019-2023 ACS 5-year five-year estimates. Places under 65,000 residents only appear in the five-year release, never the one-year file, so these values pool sixty months of responses and lag the current year by design.