94,913 people (2024 Census estimate, +2.1% since 2020)
213 square miles of land · 445 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.
30 active community water systems list Calvert County in the area they serve, reporting 36,050 people served in all (a system that crosses county lines counts its whole population).
| CHESAPEAKE RANCH ESTATES groundwater · private · MD0040004 | 9,500 served |
| TOWN OF CHESAPEAKE BEACH groundwater · local government · MD0040003 | 5,000 served |
| PRINCE FREDERICK groundwater · local government · MD0040011 | 4,371 served |
| SOLOMONS groundwater · local government · MD0040027 | 3,811 served |
| TOWN OF NORTH BEACH groundwater · local government · MD0040030 | 3,000 served |
| BEACHES WATER CO-OPERATIVE groundwater · private · MD0040009 | 2,000 served |
| SCIENTISTS CLIFFS groundwater · private · MD0040014 | 1,425 served |
| CHESAPEAKE HEIGHTS (BAYSIDE FOREST) groundwater · local government · MD0040018 | 1,190 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 109 people were held in Calvert County's jail, in Vera's latest figure (2024), or 178 per 100,000 residents ages 15–64. In 2019 it was about 139.
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 Calvert County. School taxes are usually the largest part of a property tax bill.
Spent $261.2 million — $225.8 million to run schools, about $14,606 per student, plus $30.2 million on buildings and equipment. Money in: $162.5 million local (mostly property tax), $123.8 million state, $22.8 million federal. Long-term debt: $45 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: Very Low compared with other U.S. counties. FEMA estimates natural hazards cost Calvert County about $16 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.
34 bridges in Calvert County: 16 in good condition, 18 fair, and 0 poor (0.0%). “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.
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $22.3 million of work in Calvert County in fiscal 2025, about $240 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 Calvert 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 Calvert County built: brayden.ozark@gmail.com.
More of Maryland: the state government and every county in Maryland.
Nearby counties: St. Mary's County (21 mi) · Talbot County (25 mi) · Charles County (26 mi) · Dorchester County (27 mi) · Prince George's County (27 mi) · Westmoreland County, VA (32 mi).