90,027 people (2024 Census estimate, −1.7% since 2020)
458 square miles of land · 197 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.
11 active community water systems list Northumberland County in the area they serve, reporting 86,490 people served in all (a system that crosses county lines counts its whole population).
| AQUA PA ROARING CREEK DIVISION surface water · private · PA4490024 | 43,000 served |
| PA AMERICAN WHITE DEER surface water · private · PA4490023 | 30,209 served |
| MUNICIPAL AUTHORITY SUNBURY surface water · local government · PA4490007 | 11,043 served |
| PA AMERICAN TURBOTVILLE groundwater (surface-influenced) · private · PA4490016 | 705 served |
| LOWER MAHANOY TWP MUN AUTH groundwater · private · PA4490018 | 450 served |
| HERNDON BORO JACKSON TWP JMA groundwater · local government · PA4490020 | 432 served |
| PA AMERICAN MCEWENSVILLE groundwater · private · PA4490298 | 282 served |
| AQUA PA EAST CAMERON groundwater · public/private · PA4490011 | 200 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 151 people were held in Northumberland County's jail, in Vera's latest figure (2023), or 273 per 100,000 residents ages 15–64. In 2018 it was about 202.
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.
6 school districts have their office in Northumberland County. School taxes are usually the largest part of a property tax bill.
Spent $54.2 million — $43.4 million to run schools, about $15,457 per student, plus $6 million on buildings and equipment. Money in: $23.8 million local (mostly property tax), $26.5 million state, $8.5 million federal. Long-term debt: $30.1 million.
Spent $42 million — $39.2 million to run schools, about $17,696 per student, plus $260,000 on buildings and equipment. Money in: $9.2 million local (mostly property tax), $23.8 million state, $9.4 million federal. Long-term debt: $7.9 million.
Spent $45.9 million — $37 million to run schools, about $19,269 per student, plus $6.9 million on buildings and equipment. Money in: $20 million local (mostly property tax), $18.7 million state, $4.8 million federal. Long-term debt: $38.3 million.
Spent $23.7 million — $21.4 million to run schools, about $13,817 per student, plus $244,000 on buildings and equipment. Money in: $6 million local (mostly property tax), $16.3 million state, $2.7 million federal. Long-term debt: $9.2 million.
Spent $36.6 million — $23.9 million to run schools, about $16,327 per student, plus $10.8 million on buildings and equipment. Money in: $15.7 million local (mostly property tax), $13 million state, $3.2 million federal. Long-term debt: $35.9 million.
Spent $22 million — $20.7 million to run schools, about $20,559 per student, plus $97,000 on buildings and equipment. Money in: $9.2 million local (mostly property tax), $12.3 million state, $2.5 million federal. Long-term debt: $19.8 million.
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 Northumberland County about $37.3 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Very High; social vulnerability: Relatively Moderate.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
298 bridges in Northumberland County: 127 in good condition, 151 fair, and 20 poor (6.7%). “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.
| W WALNUT ST over SHAMOKIN CREEK · built 1914 | 8,400 vehicles a day |
| SR 890 over LITTLE SHAMOKIN CREEK · built 1949 | 2,336 vehicles a day |
| WARRIOR RUN BLVD. over WARRIOR RUN · built 1920 | 1,200 vehicles a day |
| WILLOW STREET over SHAMOKIN CREEK · built 1906 | 600 vehicles a day |
| T-506 (8th Street) over Zerbe Run · built 1904 | 400 vehicles a day |
| SR 2010 over OVER SHAMOKIN CREEK · built 1937 | 311 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $23.7 million of work in Northumberland County in fiscal 2025, about $259 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 Pennsylvania 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 Northumberland 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 Northumberland County built: brayden.ozark@gmail.com.
More of Pennsylvania: the state government and every county in Pennsylvania.
Nearby counties: Montour County (12 mi) · Union County (20 mi) · Snyder County (20 mi) · Columbia County (21 mi) · Schuylkill County (28 mi) · Dauphin County (31 mi).