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Maryland · Southern Maryland · Washington DC Metro · #384 Most Populous County in the US
Charles County, Maryland
Southern Maryland's fastest-growing county along the Potomac - from Waldorf's massive suburban expansion and White Plains's retail hub to La Plata's historic courthouse town, the Indian Head Naval Surface Warfare Center, and the Potomac River communities connecting to Virginia across the water. Property tax, courts, public records, and senior services for Charles 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.
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Charles 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: Charles County Emergency Services – 10425 Audie Ln, La Plata, MD 20646 | (301) 609-3400 | Fax (301) 609-3401; core values: Safety, Excellence, Respect, Vision, Equity; works alongside the Charles County Emergency Operations Center. Hours: Mon-Fri 8 AM-4:30 PM.
Sheriff: Charles County Sheriff’s Office (CCSO) – 6915 Crain Hwy, La Plata, MD 20646 | (301) 932-2222 or (301) 870-3232; Sheriff Troy D. Berry; nationally accredited (CALEA); created in 1658 with the appointment of Nicholas Gwyther as dual Sheriff of Charles and St. Mary’s Counties; serves roughly 458 square miles and 166,000+ residents with over 900 sworn and civilian employees across nine divisions; the Patrol Division splits the county into four districts (La Plata, Indian Head, Waldorf, St. Charles). Current headquarters opened in 2000, the first building purpose-built as CCSO’s flagship.
Notes: For an active emergency, call 911.
Roads & Utilities
ROADS & TRANSPORTATION
Roads: US-301 and MD-5 serve La Plata, the county seat, in Southern Maryland.
Notes: Charles County sits less than an hour from Washington, D.C. and historic Annapolis, a proximity that has shaped its history for centuries.
Business & Permits
BUILDING & PERMITS
Office: Charles County Circuit Court – 200 Baltimore Street, La Plata, MD 20646 | (301) 645-0550 | Hours Mon-Fri 8 AM-4:30 PM.
Notes: Charles County is genuinely tied to one of the most consequential nights in American history. In the early hours of April 15, 1865, just after assassinating President Abraham Lincoln, John Wilkes Booth arrived with an injured leg at the Waldorf home of Dr. Samuel A. Mudd, who set the fracture without (by his own claim) recognizing his patient. Mudd was later convicted of conspiracy and sentenced to life imprisonment at Fort Jefferson, Florida, where he distinguished himself treating fellow prisoners and guards during a deadly 1867 yellow fever outbreak before being pardoned by President Andrew Johnson in 1869. The Dr. Samuel A. Mudd House Museum, built 1857 and located north of Bryantown, remains open to visitors seasonally. Charles County was also the landing point for British troops in the War of 1812 at the small town of Benedict, en route to burning Washington, D.C.
Veterans Services
VETERANS SERVICES
Office: Charles County Veterans Affairs – confirm current contact via charlescountymd.gov.
Libraries
LIBRARIES
Charles County Public Library – confirm current address/phone via ccplonline.org.
Parks & Recreation
PARKS & RECREATION
Key Assets: The Dr. Samuel A. Mudd House Museum, the Maryland Veterans Museum, and the African American Heritage House are the county’s premier attractions.
Notes: The genuine Dr. Mudd/Booth connection – and Mudd’s own path from convicted conspirator to presidential pardon – is one of the most historically resonant and InmateAid-relevant local facts covered anywhere in this project.
GIS & Maps
GIS & MAPS
Appraisal/Parcel Search: Charles County Department of Planning and Growth Management – confirm current contact via charlescountymd.gov.
Animal Services
ANIMAL SERVICES
Humane Society of Charles County (HSCC) – 71-72 Industrial Park Drive, Waldorf, MD 20602 | (301) 645-8181 | Fax (301) 632-6905 | Email: [email protected]; a no-kill, open-admission nonprofit shelter serving the Southern Maryland tri-county area (Charles, Calvert, St. Mary’s, and parts of Prince George’s Counties); provides adoption, fostering, community partnerships, education, and affordable spay/neuter and vaccine services; visits currently by appointment only. Hours: Mon/Tue/Thu/Fri/Sat 12-6 PM, closed Wed.
Environmental & Waste
ENVIRONMENTAL / WASTE MANAGEMENT
Office: Charles County Department of Public Works – confirm current contact via charlescountymd.gov.
NOTES: Charles County is the third county in the second batch of the Maryland v2 A+ sourced redo. The genuine Dr. Mudd/Booth connection – and Mudd’s own path from convicted conspirator to presidential pardon – is one of the most historically resonant and InmateAid-relevant 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 Charles County
Charles County is Maryland’s sixth most populous county and the 384th most populous in the United States, covering 458 square miles of Southern Maryland along the Potomac River.
Waldorf (unincorporated, population ~90,000+) is Charles County’s – and Southern Maryland’s – primary commercial and population center, an unincorporated community that has grown into one of the largest unincorporated communities in the United States without ever incorporating as a city. Waldorf’s growth has been driven by its position on US-301 south of Prince George’s County – a more affordable alternative to the closer-in DC suburbs that attracted massive residential development from the 1970s onward. The St. Charles planned community and numerous other residential developments have continuously expanded Waldorf’s footprint.
La Plata (the county seat, population ~10,000) is a historic small town with a well-preserved courthouse square. Despite Waldorf’s dominance in population, La Plata maintains county government functions and a distinct identity.
White Plains is the county’s primary retail and commercial district – the White Plains Regional Shopping Center and surrounding commercial development along US-301 serve as the retail hub for all of Southern Maryland.
Indian Head (population ~4,000) is a small town on the Potomac River home to Indian Head Naval Surface Warfare Center (NSWC-IH) – a major Navy research and development facility focused on energetics (explosives, propellants, and pyrotechnics) and the primary hub of the Navy’s explosives technology mission. NSWC-IH is a major employer in Charles County and Southern Maryland.
Charles County has one of the largest concentrations of African American suburban homeowners in the DC metro area – a demographic pattern established by the migration of Black families from Prince George’s County and DC seeking homeownership opportunities in a lower-cost Southern Maryland environment.
All Services
Browse every category and topic available for this county.
Maryland’s SDAT reassesses one-third of Charles County properties annually at full cash value. The Homestead Property Tax Credit caps annual taxable assessment increases for owner-occupied primary residences at 5%.
The appeal process: File within 45 days of receiving your assessment notice with SDAT. If dissatisfied, appeal to the Maryland Tax Court within 30 days.
MD estate tax: Above $5 million at rates up to 16%. Maryland inheritance tax of 10% on assets to collateral heirs – direct descendants and spouses exempt.
OWNWELL CTA: Charles County SDAT reassessment on three-year cycle – 45-day appeal window. Waldorf and White Plains appreciation driven by DC commuter demand. MD estate tax above $5M; inheritance tax 10% to collateral heirs. Ownwell manages the appeal with no upfront cost.
Recommended
Charles County SDAT reassessment on three-year cycle - 45-day appeal window. Waldorf and White Plains appreciation driven by DC 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 Charles County Orphans’ Court and Register of Wills at 200 Baltimore Street, La Plata, MD 20646, phone 301-932-3280, handle wills, estate administration, and guardianships.
Circuit Court: The Charles County Circuit Court at 200 Baltimore Street handles major civil and criminal matters.
Land Records: The Charles County Circuit Court, Land Records Division maintains real property records. Maryland land records searchable through mdlandrec.net.
Senior Services
The Charles County Department of Community Services, Senior Services Division at 8190 Port Tobacco Road, Port Tobacco, MD 20677, phone 301-934-9305, serves the county’s growing senior population with in-home services, caregiver support, nutrition programs, transportation, and benefits counseling. University of Maryland Charles Regional Medical Center in La Plata provides significant geriatric care.
Recommended
Assisted living, memory care, and independent living across Charles County - from Waldorf and La Plata to White Plains, Indian Head, and the Potomac River 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)
200 Baltimore St., La Plata, MD 20646
(301) 932-3201
Genealogy
County-level record sources
Charles County Register of Wills (estate/probate case files – see Probate section above).
“Index to Charles County, Maryland, Wills, 1658-1777” is a specific published resource for this county.
The Exchange (1778) and The Hermitage (c. 1847), both in La Plata, are listed on the National Register of Historic Places.
Local societies
No dedicated Charles 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
Charles County Register of Wills 11 Washington Avenue (P.O. Box 3080), La Plata, MD 20646-3080 (301) 932-3345
Charles County was founded April 13, 1658, named for Charles Calvert, 3rd Baron Baltimore, in southern Maryland. Its seat, La Plata, is smaller than its largest community, Waldorf.
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
10 Washington Ave., La Plata, MD 20646
(301) 932-2222
Elections & Voting
Voter registration, polling locations, and elections information are handled by the following office(s):
ELECTIONS
200 Baltimore St., La Plata, MD 20646
(301) 932-3636
Health & Human Services
Offices & Contacts
Health services, social services, and assistance programs are handled by the following office(s):
Charles County Health Dept
(301) 934-7100
Dept of Social Services
(301) 934-8000
MD Medicaid
(800) 492-5231
University of Maryland Charles Regional Medical Center
umcrmc.org (La Plata — quality community hospital)
Public Health Information
PUBLIC HEALTH
Office: Charles County Health Department – confirm current phone via charlescountymd.gov.
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Recommended for Maryland
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