602,350 people (2024 Census estimate, +1.5% since 2020)
415 square miles of land · 1,452 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.
28 active community water systems list Anne Arundel County in the area they serve, reporting 508,602 people served in all (a system that crosses county lines counts its whole population).
| GLEN BURNIE-BROADNECK groundwater · local government · MD0020017 | 290,606 served |
| CROFTON-ODENTON groundwater · local government · MD0020008 | 62,986 served |
| FORT GEORGE G. MEADE groundwater · federal · MD0020012 | 62,234 served |
| CITY OF ANNAPOLIS groundwater · local government · MD0020001 | 35,000 served |
| BROAD CREEK groundwater · local government · MD0020004 | 26,033 served |
| U.S. NAVAL ACADEMY groundwater · federal · MD0020042 | 8,700 served |
| MARYLAND AMERICAN WATER--SEVERN SYSTEM groundwater · private · MD0020027 | 5,447 served |
| MD AMERICAN WATER PROVINCES groundwater · private · MD0020029 | 3,886 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 537 people were held in Anne Arundel County's jail, in Vera's latest figure (2024), or 139 per 100,000 residents ages 15–64. In 2019 it was about 640.
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.
1 school district has its office in Anne Arundel County. School taxes are usually the largest part of a property tax bill.
Spent $1.8 billion — $1.5 billion to run schools, about $17,624 per student, plus $242.4 million on buildings and equipment. Money in: $1 billion local (mostly property tax), $612 million state, $177.2 million federal. Long-term debt: $848.8 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 Moderate compared with other U.S. counties. FEMA estimates natural hazards cost Anne Arundel County about $74.7 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.
392 bridges in Anne Arundel County: 124 in good condition, 264 fair, and 4 poor (1.0%). “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.
| HOSPITAL DRIVE over MARLEY CREEK · built 1991 | 5,095 vehicles a day |
| ROCK AVE over MIDWAY BRANCH · built 1984 | 800 vehicles a day |
| McKENDREE ROAD over LYONS CREEK · built 1965 | 623 vehicles a day |
| OCONNOR ROAD over DEEP RUN · built 1944 | 599 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $261.4 million of work in Anne Arundel County in fiscal 2025, about $444 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 Maryland 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 Anne Arundel 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 Anne Arundel County built: brayden.ozark@gmail.com.
More of Maryland: the state government and every county in Maryland.
Nearby counties: Prince George's County (19 mi) · Baltimore city (21 mi) · District of Columbia, DC (25 mi) · Queen Anne's County (26 mi) · Talbot County (27 mi) · Howard County (27 mi).