Suffolk County, New York Population 2020

Suffolk County, New York's estimated population is 1,476,140 with a growth rate of -0.17% in the past year according to the most recent United States census data. Suffolk County, New York is the 4th largest county in New York.

Year Population Growth Growth Rate
20201,476,140-2,480-0.17%
20191,478,620-2,470-0.17%
20181,481,090-2,480-0.17%
20171,483,570-3,230-0.22%
20161,486,800-5,480-0.37%
20151,492,280-3,480-0.23%
20141,495,760-1,730-0.12%
20131,497,4904500.03%
20121,497,040-1,800-0.12%
20111,498,8404,4600.30%
20101,494,380172,52013.05%
19901,321,86037,6302.93%
19801,284,230159,28014.16%
19701,124,950458,16668.71%
1960666,784390,655141.48%
1950276,12978,77439.91%
1940197,35536,30022.54%
1930161,05550,80946.09%
1920110,24614,10814.67%
191096,13818,55623.92%
190077,58215,09124.15%
189062,4918,60315.96%
188053,8886,96414.84%
187046,9243,6498.43%
186043,2756,35317.21%
185036,9224,45313.71%
184032,4695,68921.24%
183026,7802,50810.33%
182024,2723,15914.96%
181021,1131,3786.98%
180019,7353,29520.04%
179016,4400.00%
2020 Growth Rate
-0.17%
County Website
Founded
1683
County Seat
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Suffolk County, New York Population Growth

Population by Race

Race Population Percentage
White1,200,55280.69%
Black or African American116,8807.86%
Some Other Race73,6434.95%
Asian57,5273.87%
Two or More Races34,8802.34%
American Indian and Alaska Native3,9670.27%
Native Hawaiian and Other Pacific Islander4510.03%
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Suffolk County, New York Population Pyramid 2020

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Suffolk County, New York Median Age

41.3


Total

39.7


Male

42.9


Female

Suffolk County, New York Adults

There are 1,164,990 adults, (239,139 of whom are seniors) in Suffolk County, New York.

Suffolk County, New York Age Dependency

60.7

Age Dependency Ratio

25.8

Old Age Dependency Ratio

34.9

Child Dependency Ratio

Suffolk County, New York Sex Ratio

Female

755,632

50.79%

Male

732,269

49.21%

Suffolk County, New York Households and Families

Suffolk County, New York Renter vs Owner Occupied by Household Type

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Suffolk County, New York Household Types

Type Owner Renter
Married89.5%10.5%
All80.1%19.9%
Male72.5%27.5%
Female68.3%31.7%
Non Family66.3%33.7%

80.1%

Rate of Home Ownership

Type Count Average Size Owned
All487,9812.9980.1
Married280,4053.5889.5
Non Family130,5811.2566.3
Female54,3203.7768.3
Male22,6753.8472.5

3.51

Average Family Size

2.99

Average Household Size

4.7%

Unmarried (Opposite Sex)

0.3%

Unmarried (Same Sex)

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Suffolk County, New York Education

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Education Attained Count Percentage
Less Than 9th Grade45,9954.47%
9th to 12th Grade52,6125.11%
High School Graduate287,53827.95%
Some College180,81417.57%
Associates Degree95,5139.28%
Bachelors Degree200,41219.48%
Graduate Degree165,93616.13%
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Suffolk County, New York Educational Attainment by Race

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Name Total High School Bachelors
White745,726707,501293,621
Hispanic163,075115,69428,852
Black73,24064,39017,885
Other Race41,80427,0476,092
Asian38,22134,88822,634
Multiple Races15,03211,8774,079
Native American2,7002,037621
Islander326283140

The highest rate of high school graduation is among white people with a rate of 94.87%.

The highest rate of bachelors degrees is among asian people with a rate of 59.22%.

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Name Average Male Female
Overall$51,773$61,200$42,015
Less Than High School$27,023$31,543$21,649
High School Grad$40,371$48,988$31,193
Some College$48,468$60,100$38,165
Bachelors Degree$64,592$80,888$53,061
Graduate Degree$87,273$105,102$76,418

$51,773

Average Earnings

$61,200

Average Male

$42,015

Average Female

Suffolk County, New York Language

Suffolk County, New York Language by Age

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Suffolk County, New York Language

77.34% of Suffolk County, New York residents speak only English, while 22.66% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 14.22% of the population.

Suffolk County, New York Poverty

Suffolk County, New York Poverty by Race

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Name Total In Poverty Poverty Rate
White1,000,21049,8044.98%
Hispanic275,80334,46012.49%
Black112,82314,36512.73%
Other71,6519,21912.87%
Multiple33,0404,12412.48%
Asian52,8724,0987.75%
Native3,87360915.72%
Islander4396514.81%

7.12%

Overall Poverty Rate

6.33%

Male Poverty Rate

7.87%

Female Poverty Rate

Poverty in Suffolk County, New York

The race most likely to be in poverty in Suffolk County, New York is Native, with 15.72% below the poverty level.

The race least likely to be in poverty in Suffolk County, New York is White, with 4.98% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.29%. Among those working part-time, it was 7.69%, and for those that did not work, the poverty rate was 12.95%.

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Name Poverty
Less Than High School16.50%
High School8.34%
Some College5.26%
Bachelors or Greater2.93%
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Name Poverty
Female Unemployed19.64%
Male Unemployed16.40%
Female Employed3.39%
Male Employed2.65%

Suffolk County, New York Income

Suffolk County, New York Income by Household Type

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Name Median Mean
Households$96,675$123,111
Families$113,432$139,849
Married Families$126,734$154,769
Non Families$48,356$69,065
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Suffolk County, New York Marital Status

Suffolk County, New York Marital Status

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Marriage Rates

51.0%

Overall Marriage Rate

53.0%

Male Marriage Rate

49.1%

Female Marriage Rate

Suffolk County, New York Married by Age and Sex

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Suffolk County, New York Marriage

The age group where males are most likely to be married is 45-54, while the female age group most likely to be married is 45-54.

Suffolk County, New York Marital Status by Race

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Suffolk County, New York Veterans

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63,703

Number of Veterans

60,191

Male Veterans

3,512

Female Veterans

War Veterans
Vietnam23,721
Korea8,597
First Gulf War6,857
Second Gulf War5,609
World War II4,093
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Age Group Veterans
75+21,718
65 to 7419,698
35 to 5410,653
55 to 648,772
18 to 342,862
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Name Veterans % of Total
White58,0556.06%
Hispanic5,1762.69%
Black3,6124.15%
Asian6901.53%
Other6441.28%
2 or More5282.75%
Indian1745.35%

Suffolk County, New York Veterans by Education

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4.32%

Veteran Poverty Rate

24.73%

Veteran Disability Rate

Suffolk County, New York Employment Status

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64.9%

Labor Force Participation

61.7%

Employment Rate

4.7%

Unemployment Rate

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Origin of Non-Citizens

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Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

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76.08%

Born in New York

84.48%

Native Born

15.52%

Foreign Born

6.98%

Non Citizen

8.55%

Naturalized

Place of Birth

84.48% of Suffolk County, New York residents were born in the United States, with 76.08% having been born in New York. 6.98% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

  1. US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. Population of States and Counties of the United States: 1790 - 1990