Sussex County, New Jersey

Sussex County population, land area and income

Sussex County had 147,444 residents in the Census Vintage 2024 estimate, on 518.5 square miles of land. It ranks 17th of 21 in New Jersey by population and 4th by land area. That works out to 284.4 people per square mile, 3.0 times the US average of 96.3, and in the top quarter nationally.

The median county-equivalent in New Jersey has 475,515 residents, so Sussex County has 31% of the typical county's population.

Its SAIPE 2023 median household income of $109,884 is in the top tenth among 3,143 counties with an estimate.

How Sussex County's population changed since 2020

Sussex County gained 3,525 residents between the July 2020 and July 2024 estimates, a rise of 2.4%. That ranks 10th of 21 in New Jersey for growth. The median New Jersey county changed by +2.3%, and the state as a whole by +2.5%.

Since the April 2020 estimates base, Sussex County recorded 5,936 births and 6,208 deaths, a natural change of -272. Net international migration added +797 and net domestic migration, people moving to or from other US counties, came to +2,836. The largest single component was domestic migration, which added 2,836 people.

Where Sussex County is

The Census internal point of Sussex County is at 41.137500, -74.691900. It sits in UTM zone 18N. The map shades New Jersey's 21 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Sussex County outlined. Dots are towns of 1,000+ people with residents in it.

Towns in Sussex County

7 incorporated places of 1,000+ people have residents in Sussex County, 39,576 people together, or 27% of the county. Each figure counts only the part of the town inside Sussex County; towns marked "part" extend into another county. The largest is Hopatcong with 14,750.

Counties bordering Sussex County

The Census 2024 county adjacency file lists 6 neighbors for Sussex County, including 3 across a state line. The most populous is Passaic County, NJ, with 526,597 residents. Distances run between Census internal points in a straight line.

• Passaic County

  526,597 people

  22 mi ESE

• Morris County

  523,053 people

  21 mi SSE

• NY

  Orange County, NY

  411,767 people

  27 mi NE

• PA

  Monroe County, PA

  166,523 people

  34 mi W

• Warren County

  112,031 people

  26 mi SW

• PA

  Pike County, PA

  62,376 people

  22 mi NW

Distance to Trenton and the nearest big city

Trenton is 63.4 miles S of Sussex County's internal point in a straight line. The nearest place of 100,000 or more is Paterson, NJ (population 160,463), 31.6 miles away. The nearest place of 10,000 or more is Hopatcong, NJ (population 14,750), 12.9 miles away.

Sussex County FIPS code

The FIPS code of Sussex County is 34037: state code 34 for New Jersey plus county code 037. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $109,884.