Affiliate disclosure: This page contains affiliate links. We may earn a commission if you use them, at no extra cost to you. Our editorial recommendations are independent of these relationships.
Maryland · Southern Maryland · Chesapeake Bay · #606 Most Populous County in the US
Calvert County, Maryland
Southern Maryland's Chesapeake Bay peninsula county - from the Calvert Cliffs fossil beds and the Chesapeake Beach railroad resort to Prince Frederick's courthouse community, the Chesapeake's sailing and fishing heritage, and a county shaped by the Calvert Cliffs Nuclear Power Plant and the Bay's extraordinary natural resources. Property tax, courts, public records, and senior services for Calvert County residents.
Affiliate disclosure: This page contains affiliate links. We may earn a commission if you use them, at no extra cost to you. Our editorial recommendations are independent of these relationships.
What do you need to do?
Tell us your goal and we'll guide you step-by-step to the right office, forms, and official resources.
Calvert County's assessment ratio means effective tax rates are low — but incorrect appraisals still cost money. Ownwell manages the appeal with no upfront cost.
Office: Calvert County Department of Public Safety – 175 Main Street, Prince Frederick, MD 20678 | (410) 535-1600, ext. 2638 | Fax (410) 535-3997; operates the county’s 911 network and Emergency Operations Center; oversees Fire-Rescue-EMS, Animal Control, and serves as liaison between county, state, and federal Homeland Security partners. Non-emergency hours Mon-Fri 8:30 AM-4:30 PM.
Sheriff: Calvert County Sheriff’s Office – 30 Church St, Prince Frederick, MD 20678 | (410) 535-2800 or (301) 855-1194; Sheriff Ricky Cox; formed in 1654, the year Calvert County itself was created; serves roughly 213 square miles and 88,000+ residents; bureaus include Administrative & Judicial Services (Civil Process, Courthouse Security, Southern Maryland Criminal Justice Academy), Criminal Investigations, Patrol (K-9, Community Action Team, Motorcycle Unit, Twin Beaches Patrol), Special Operations & Homeland Security, and the Detention Center; partnered with Calvert County Alert (Everbridge) for countywide emergency notifications. Hours: Mon-Fri 8:30 AM-4:30 PM.
Notes: For an active emergency, call 911.
Roads & Utilities
ROADS & TRANSPORTATION
Roads: MD-2/MD-4 and MD-231 serve Prince Frederick, the county seat, on a tidewater peninsula between the Patuxent River and the Chesapeake Bay.
Notes: Calvert County has the smallest land area of any county in Maryland, at roughly 215 square miles.
Business & Permits
BUILDING & PERMITS
Office: Calvert County Circuit Court – Prince Frederick, MD.
Notes: Calvert County was originally named Patuxent County when created in 1654, later renamed for Cecilius Calvert, 2nd Baron Baltimore, founder of Maryland as a sanctuary for Roman Catholics. The county is genuinely home to the Calvert Cliffs, a roughly 30-mile stretch of Chesapeake Bay shoreline exposing the most complete section of Miocene-epoch (roughly 8-20 million years old) fossil deposits in the eastern United States – over 600 species of plants and animals have been documented there, including ancient sharks (notably megalodon), whales, dolphins, and sea cows. Because most cliff-front land is privately owned, public collecting access is limited primarily to Calvert Cliffs State Park and the Calvert Marine Museum’s paleontology programs.
Veterans Services
VETERANS SERVICES
Office: Calvert County Veterans Affairs – confirm current contact via calvertcountymd.gov.
Libraries
LIBRARIES
Calvert Library – confirm current address/phone via calvertlibrary.info.
Parks & Recreation
PARKS & RECREATION
Key Assets: Calvert Cliffs State Park, the Calvert Marine Museum (Solomons), and Jefferson Patterson Park & Museum are the county’s premier attractions.
Notes: The genuine Miocene fossil heritage of the Calvert Cliffs is one of the most scientifically distinctive local facts covered anywhere in this project.
GIS & Maps
GIS & MAPS
Appraisal/Parcel Search: Calvert County Department of Planning & Zoning – confirm current contact via calvertcountymd.gov.
Animal Services
ANIMAL SERVICES
Calvert County Animal Control (Linda L. Kelley Animal Shelter) – 5055 Hallowing Point Road, Prince Frederick, MD 20678 | (410) 535-7387; five full-time Animal Control officers plus a supervisor and dispatcher enforce county dog/cat regulations and state animal cruelty laws. Hours: Mon (reclaim/surrender only) 10 AM-4 PM, Tue-Sat 10 AM-4 PM.
Environmental & Waste
ENVIRONMENTAL / WASTE MANAGEMENT
Office: Calvert County Department of Public Works – confirm current contact via calvertcountymd.gov.
NOTES: Calvert County is the fifth county in the first batch of the Maryland v2 A+ sourced redo. The genuine Miocene fossil heritage of the Calvert Cliffs is one of the most scientifically distinctive local facts covered anywhere in this project. All contact information above was sourced via web search as of early August 2026 and should be reconfirmed directly with the relevant office before a visit, deadline-sensitive filing, or emergency-adjacent decision.
About Calvert County
Calvert County is Southern Maryland’s Chesapeake Bay peninsula county and the 606th most populous in the United States, covering 215 square miles – one of the narrowest counties in the United States, averaging only about 6 miles wide, running 35 miles along the western shore of the Chesapeake Bay.
Prince Frederick (the county seat, unincorporated, population ~4,500) is the county’s governmental center – a small community in the county’s interior that has served as the Calvert County seat since the 18th century.
Chesapeake Beach and North Beach are twin resort communities on the Bay’s western shore – developed as railroad resort destinations in the early 20th century when entrepreneur Otto Mears built the Chesapeake Beach Railway from Washington DC to create a summer escape for the capital’s residents. The railroad closed in 1935 but the resort character of both communities persists, and the Chesapeake Beach Railway Museum preserves the history.
The Calvert Cliffs – a 30-mile stretch of the Chesapeake Bay shoreline featuring 15-million-year-old Miocene marine fossils embedded in the clay cliffs – make Calvert County unique in the Mid-Atlantic. Calvert Cliffs State Park allows visitors to search the beach below the cliffs for shark teeth (over 600 species of sharks inhabited these Miocene seas), and the county produces more fossil shark teeth per square mile than virtually anywhere on earth.
The Calvert Cliffs Nuclear Power Plant – two nuclear reactors on the Bay shore – provides clean power and approximately 1,300 jobs that represent a significant economic anchor for the county.
All Services
Browse every category and topic available for this county.
Maryland’s SDAT reassesses one-third of Calvert County properties annually at full cash value. The Homestead Property Tax Credit caps annual taxable assessment increases at 5% for owner-occupied primary residences. File within 45 days of assessment notice. If dissatisfied, appeal to Maryland Tax Court within 30 days. MD estate tax above $5 million; inheritance tax 10% to collateral heirs.
OWNWELL CTA: Calvert County SDAT reassessment on three-year cycle – 45-day appeal window. Chesapeake Bay waterfront appreciation driven by DC-Baltimore commuter demand. MD estate tax above $5M; inheritance tax 10% to collateral heirs. Ownwell manages the appeal with no upfront cost.
Recommended
Calvert County SDAT reassessment on three-year cycle - 45-day appeal window. Chesapeake Bay waterfront appreciation driven by DC-Baltimore commuter demand. MD estate tax above $5M; inheritance tax 10% to collateral heirs. Ownwell manages the appeal with no upfront cost.
Courts & Legal
Courts & Legal
Orphans’ Court (Probate): The Calvert County Orphans’ Court and Register of Wills at 175 Main Street, Prince Frederick, MD 20678, phone 410-535-1660, handle wills, estate administration, and guardianships. Circuit Court and Land Records at same address. Maryland land records searchable through mdlandrec.net.
Senior Services
The Calvert County Department of Community Resources, Aging Services Division at 30 Duke Street, Prince Frederick, MD 20678, phone 410-535-4606, serves the county’s senior population. CalvertHealth Medical Center provides significant geriatric care.
Recommended
Assisted living, memory care, and independent living across Calvert County - from Prince Frederick and Chesapeake Beach to North Beach, Dunkirk, and the Chesapeake Bay communities.
Marriage & Vital Records
Marriage licenses, divorce records, and birth & death certificates are handled by the following office(s):
CIRCUIT COURT CLERK (Land Records & Court Filings)
175 Main St., Prince Frederick, MD 20678
(410) 535-1660
Genealogy
County-level record sources
Calvert County Register of Wills (estate/probate case files – see Probate section above).
A published index to Calvert County wills, 1654-1777, is a specific genealogical resource for this county’s colonial era.
Local societies
No dedicated Calvert County genealogical society was confirmed in available directories.
Probate & Estate
Losing someone and having to deal with courts and paperwork at the same time is hard. This section won’t make that easier, but it should tell you what to expect, what it costs, and where to go – so at least you’re not walking in blind.
Where to go
Calvert County Register of Wills Calvert County Courthouse, 175 Main Street, Prince Frederick, MD 20678 (410) 535-1600 ext. 2256
Calvert County is on the Chesapeake Bay’s western shore in southern Maryland, seated in Prince Frederick.
Step 1: figure out which path applies
Maryland is NOT a Uniform Probate Code state – it follows its own framework under the Maryland Estates and Trusts Article, administered through the Register of Wills rather than a traditional probate court in most cases.
Small Estate Administration – for a gross probate estate of $50,000 or less, or $100,000 or less if the surviving spouse is the sole heir or legatee. Filed as a Petition for Administration of a Small Estate. There is no filing fee for small estates opened on or after October 1, 2022. Small estates typically close in 2 to 4 months.
Modified Administration – available for Regular Estates when the residuary legatees consist of the personal representative and non-taxable recipients of property (spouse, children, parents, grandparents, siblings), the estate is solvent, and all consent. The personal representative must elect this within 3 months of appointment, files a verified Final Report within 10 months, and must complete final distribution within 12 months of appointment.
Regular Estate (Administrative Probate) – required when probate assets exceed $50,000 (or $100,000 with spouse as sole heir). Requires a formal Inventory (due within 3 months) and Account (first account due within 9 months, can be filed as early as 6 months), with a fee based on estate value.
Judicial Probate – conducted by the Orphans’ Court rather than administratively through the Register of Wills, required when the will’s validity is questioned, the will is damaged, or more than one qualified person petitions to serve as personal representative.
Step 2: filing for probate
File a Petition for Administration (Form 1103, plus Schedule B/Form 1137 as needed) with the Register of Wills in the county where the decedent was domiciled at death.
The Register of Wills reviews the petition and, following the statutory order of priority, appoints a personal representative and issues Letters of Administration.
Notice to creditors is published by the Register in a newspaper; creditors have 6 months from the date of death (or 2 months after being mailed notice, whichever is later) to file a claim, or they’re barred from collecting.
The personal representative pays valid debts, files the required Inventory and/or Account (or Final Report under Modified Administration), pays any inheritance tax due, and distributes the remaining assets – the surviving spouse or domestic partner is entitled to a $10,000 family allowance, and $5,000 for each unmarried minor child.
What it costs
No filing fee for small estates opened on or after October 1, 2022.
Regular estates pay a probate fee based on the total gross estate value, per a published fee schedule.
Maryland imposes both a state estate tax (threshold around $5 million) and a separate inheritance tax.
Maryland does not require an attorney for probate, but complex or contested estates commonly benefit from one.
Probate filings, estate administration, and guardianship matters are handled by the following office(s):
Public Safety & Arrests
Arrest records, inmate search, and law enforcement services are handled by the following office(s):
SHERIFF
350 Main St., Prince Frederick, MD 20678
(410) 535-2800
Elections & Voting
Voter registration, polling locations, and elections information are handled by the following office(s):
ELECTIONS
30 Duke St., Prince Frederick, MD 20678
(410) 535-1711
Health & Human Services
Offices & Contacts
Health services, social services, and assistance programs are handled by the following office(s):
Calvert County Health Dept
(410) 535-5400
Dept of Social Services
(410) 535-5900
MD Medicaid
(800) 492-5231
Calvert Health Medical Center
calverthealthmd.org (Prince Frederick — quality community hospital)
Public Health Information
PUBLIC HEALTH
Office: Calvert County Health Department – confirm current phone via calvertcountymd.gov.
Editorial independence: CountyOffices maintains strict editorial independence from our affiliate partners. Our content is researched from official government sources. Affiliate relationships do not influence our recommendations or the information we publish.
Recommended for Maryland
Ownwell
Property tax appeal service. Contingency fee - no savings, no charge.
