Sussex County, New Jersey Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 17th-largest in New Jersey
The population of Sussex County, New Jersey is 145,117 as of the 2023 American Community Survey, making it the 17th-largest county in New Jersey. The median household income is $114,316, the median home value is $342,800, and the median age is 44.1.
The population of Sussex County has declined 1.0% since 2010 (148,859 → 147,444), a -0.07% annualized rate.
145,117
Population
-0.07%
Annual growth
280
People / sq mi
$114,316
Median Income
$342,800
Median Home Value
Sussex County covers 518 sq mi of land at 279.9 people per square mile.
About Sussex County, NJ
Sussex County is a county in New Jersey with a population of 145,117. It ranks #17 among counties in New Jersey by population. The median age is 44.1, older than the national median. The population is 50.2% male and 49.8% female.
The median household income in Sussex County is $114,316, above the US median of $74,580. 3.5% of residents live below the federal poverty level. Home values sit at a median of $342,800, with monthly rent averaging $1,503. The homeownership rate of 84.9% is higher than the national rate of 64.8%.
Educational attainment in Sussex County reflects 40.0% of adults 25 and older holding a bachelor's degree or higher, above the national average of 34.3%. Roughly 13.7% of workers primarily work from home, similar to the national work-from-home rate of 14.2%. The average commute is 36.3 minutes each way.
Sussex County Population History (2010-2024)
The county of Sussex County had a population of 148,859 in 2010 and 147,444 in 2024, a -1.0% growth over 14 years. The peak was 148,859 in 2010. Average annual growth rate: -0.06%.
147,444
Population (2024)
148,859
Population (2010)
148,859
Peak (2010)
-0.06%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 148,859 |
| 2011 | 148,185 |
| 2012 | 147,003 |
| 2013 | 145,672 |
| 2014 | 144,639 |
| 2015 | 143,059 |
| 2016 | 142,004 |
| 2017 | 141,267 |
| 2018 | 140,995 |
| 2019 | 140,710 |
| 2020 | 143,919 |
| 2021 | 145,741 |
| 2022 | 145,638 |
| 2023 | 146,294 |
| 2024 | 147,444 |
Race & Ethnicity
| White | 84.8% |
| Black or African American | 2.3% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 0.9% |
| Two or More Races | 0.0% |
Age & Sex
44.1
Median Age
49.8%
Female
50.2%
Male
18.4%
Age 65+
Age Distribution
Children (under 15): 15.7% · Seniors (65+): 18.4%
Income & Poverty
| Median household income | $114,316+$13,266 vs state |
| Mean household income | $143,320 |
| Per-capita income | $56,471 |
| Poverty rate | 3.5%-3.5% vs state |
| Unemployment rate | 3.6% |
| Employment-to-population | 65.0% |
Top Industries by Employment
The largest employment sector in Sussex County is professional & business services, accounting for 24.2% of workers.
How residents commute
1.1%
Drive alone
0.8%
Carpool
77.4%
Public transit
13.7%
Work from home
36.3 min
Avg commute
Housing
$342,800$-84,800 vs state
Median home value
$1,503
Median rent
84.9%
Homeownership rate
62,825
Total housing units
91.3%
Occupied
8.7%
Vacant
15.1%
Renter-occupied
Social & access
96.5%
With health insurance
96.5%
With broadband internet
21.6%
Foreign-born
4.9%
Veterans (18+)
11.1%
With a disability
88.5%
Speak language other than English at home
Education
95.4%
High School+
40.0%
Bachelor's+
Largest cities in New Jersey
Other counties in New Jersey
Part of New Jersey
Metro areas in New Jersey
County rankings
Frequently Asked Questions
Sussex County, New Jersey has a population of 145,117 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 17th-largest county in New Jersey. Population density is 280 people per square mile.
The population of Sussex County has declined 1.0% since 2010 (148,859 → 147,444), a -0.07% annualized rate.
The median household income in Sussex County, New Jersey is $114,316, with mean (average) household income of $143,320 and per-capita income of $56,471. 3.5% of residents live below the federal poverty level.
In Sussex County, the largest racial and ethnic groups are White (84.8%), Black or African American (2.3%), Hispanic or Latino (0.9%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Sussex County, New Jersey is 44.1 years. Residents are 49.8% female and 50.2% male.
The median home value in Sussex County is $342,800 and median monthly rent is $1,503. 84.9% of occupied housing units are owner-occupied. The county has 62,825 total housing units, 8.7% of which are vacant.
The largest employment sector in Sussex County, New Jersey is professional, scientific, and management services, employing 24.2% of workers. The unemployment rate is 3.6%.
Newark is among the largest cities associated with Sussex County, New Jersey, with a population of 307,188.
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Full rankings of New Jersey counties
Statewide data for New Jersey
Population, race, income, age, and trends across New Jersey
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.