147,444 people (2024 Census estimate, +2.4% since 2020)
518 square miles of land · 284 people per square mile
“Highest” and “lowest” are just order, not grades: a high rank for poverty or hazard losses means more of it. Each figure's source is in its section below.
61 active community water systems list Sussex County in the area they serve, reporting 80,682 people served in all (a system that crosses county lines counts its whole population).
| SPARTA TWP WATER UTILITY - LAKE MOHAWK groundwater · local government · NJ1918004 | 17,625 served |
| NEWTON WATER & SEWER UTILITY surface water · local government · NJ1915001 | 8,300 served |
| HOPATCONG WATER DEPT groundwater · local government · NJ1912001 | 7,224 served |
| VEOLIA WATER NEW JERSEY VERNON VALLEY groundwater · private · NJ1922026 | 5,517 served |
| FRANKLIN BD OF PUBLIC WORKS groundwater · local government · NJ1906002 | 5,500 served |
| STANHOPE W DEPT groundwater · local government · NJ1919001 | 3,730 served |
| HAMBURG BOARD OF PUBLIC groundwater · local government · NJ1909001 | 3,382 served |
| OGDENSBURG W DEPT groundwater · local government · NJ1916001 | 2,800 served |
Source: U.S. EPA Safe Drinking Water Information System (SDWIS), active community systems, . Look up any system's violations and test results with EPA's search using its ID.
About 52 people were held in Sussex County's jail, in Vera's latest figure (2021), or 54 per 100,000 residents ages 15–64. In 2016 it was about 100.
Source: Vera Institute of Justice, Incarceration Trends (built from federal Bureau of Justice Statistics jail surveys). Counties without their own jail, or that share one, may show no figure.
25 school districts have their office in Sussex County. School taxes are usually the largest part of a property tax bill.
Spent $101.7 million — $93.7 million to run schools, about $28,393 per student, plus $3.9 million on buildings and equipment. Money in: $76.2 million local (mostly property tax), $24.1 million state, $2 million federal. Long-term debt: $53 million.
Spent $87.3 million — $84.7 million to run schools, about $28,561 per student, plus $1.4 million on buildings and equipment. Money in: $46.7 million local (mostly property tax), $32.6 million state, $4.1 million federal. Long-term debt: $4.7 million.
Spent $43 million — $40.8 million to run schools, about $25,069 per student, plus $668,000 on buildings and equipment. Money in: $21.3 million local (mostly property tax), $19.9 million state, $3.1 million federal. Long-term debt: $4.7 million.
Spent $43.6 million — $39.9 million to run schools, about $28,170 per student, plus $383,000 on buildings and equipment. Money in: $27.4 million local (mostly property tax), $14.1 million state, $2.3 million federal.
Spent $31.8 million — $30.4 million to run schools, about $29,161 per student, plus $759,000 on buildings and equipment. Money in: $17.7 million local (mostly property tax), $11.3 million state, $1.9 million federal.
Spent $29.8 million — $28 million to run schools, about $33,374 per student, plus $269,000 on buildings and equipment. Money in: $20.4 million local (mostly property tax), $8.8 million state, $829,000 federal.
Spent $20.7 million — $18.7 million to run schools, about $22,299 per student, plus $1.4 million on buildings and equipment. Money in: $12.8 million local (mostly property tax), $6.3 million state, $636,000 federal.
Spent $30 million — $28.9 million to run schools, about $36,885 per student, plus $575,000 on buildings and equipment. Money in: $17.6 million local (mostly property tax), $11.1 million state, $1.4 million federal.
And 17 more.
Source: U.S. Census Bureau, 2023 Annual Survey of School System Finances. Districts are listed by the county of their main office; some serve neighboring counties too.
Source: County Health Rankings & Roadmaps 2025 (University of Wisconsin Population Health Institute), which gathers federal data (CDC, Census, and others); measures cover different recent years. Blank lines aren't reported for small counties.
Overall risk: Relatively Low compared with other U.S. counties. FEMA estimates natural hazards cost Sussex County about $58.7 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Very High; social vulnerability: Very Low.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
172 bridges in Sussex County: 41 in good condition, 116 fair, and 15 poor (8.7%). “Poor” means a main part — the deck, the beams, or the supports — is rated 4 or lower on the federal 0–9 scale. It doesn't mean unsafe to drive; unsafe bridges are closed.
| US 206 over BR. PEQUEST RIVER · built 1910 | 19,759 vehicles a day |
| NJ 15 over BEAVER RUN(PAULINS KILL) · built 1915 | 19,298 vehicles a day |
| US 206 over BIG FLAT BROOK · built 1929 | 16,806 vehicles a day |
| US 206 over DRY BROOK · built 1940 | 15,621 vehicles a day |
| US 206 over LITTLE FLAT BROOK · built 1929 | 11,687 vehicles a day |
| NJ 23 over MILL BROOK · built 1962 | 6,227 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $20.6 million of work in Sussex County in fiscal 2025, about $143 per resident — to the county, cities, schools, hospitals, nonprofits and others.
Source: USAspending.gov, grants by place of performance, fiscal 2025 (Oct. 2024 to Sept. 2025). Search it by county to see each award.
From Grants.gov: posted grants listing county governments as eligible, soonest deadline first; research-only and overseas programs left out; list updated 2026-10-13, refreshed weekly. 62 are open in all. Cities, towns, school districts and nonprofits have their own lists there.
Registration deadlines, early voting and polling places for New Jersey are on the federal site vote.gov, which links to the state's official election office.
The budget, property tax rates, audits, local officials and offices for Sussex County come from the county's own records, which we haven't gathered — not gathered, never hidden. See what a full county site looks like, or ask to have Sussex County built: brayden.ozark@gmail.com.
More of New Jersey: the state government and every county in New Jersey.
Nearby counties: Morris County (21 mi) · Passaic County (22 mi) · Pike County, PA (22 mi) · Warren County (26 mi) · Orange County, NY (27 mi) · Essex County (33 mi).