It is a good idea that we talk about Maryland Counties. Maryland is a state in the United States of America. It has 23 counties and 1 independent city called Baltimore.
The Counties include Allegany County, Anne Arundel County, Baltimore, and a lot of others. The Last Counties were formed Garret County was formed with some portions of the Allegany County.
Below is a List of Maryland Counties in alphabetical order with their Year of formation, County Seat, Population, and Area.
Table of Contents
23 A – Z Lists of Maryland Counties, Year Formed, Population, County Seat, and Area
Allegany County
Formed: 1789
County Seat: Cumberland
Population:68,106
Area: 430 sq mi
Anne Arundel County
Formed: 1650
County Seat: Annapolis
Population: 588,261
Area: 588 sq mi
Baltimore County
Formed: 1659
County Seat: Towson
Population: 854,535
Area: 682 sq mi
Baltimore City
Formed: 1851
County Seat: Baltimore City
Population: 585,708
Area: 92 sq mi
Calvert County
Formed: 1851
County Seat: Baltimore City
Population: 92,783
Area: 345 sq mi
Caroline County
Formed: 1773
County Seat: Denton
Population: 33,293
Area: 326 sq mi
Carroll County
Formed: 1837
County Seat: Westminster
Population: 172,891
Area: 452 sq mi
Cecil County
Formed: 1672
County Seat: Elkton
Population: 103,725
Area: 418 sq mi
Charles County
Formed: 1658
County Seat:La Plata
Population: 166,617
Area: 643 sq mi
Dorchester County
Formed: 1668
County Seat: Cambridge
Population: 32,531
Area: 540 sq mi
Frederick County
Formed: 1748
County Seat: Frederick
Population: 271,717
Area: 667 sq mi
Garrett County
Formed: 1872
County Seat: Oakland
Population: 28,806
Area: 656 sq mi
Harford County
Formed: 1773
County Seat: Bel Air
Population: 260,924
Area: 527 sq mi
Howard County
Formed:1851
County Seat: Ellicott City
Population: 332,317
Area: 254 sq mi
Kent County
Formed: 1642
County Seat: Chestertown
Population: 19,198
Area: 414 sq mi
Montgomery County
Formed: 1776
County Seat: Rockville
Population: 1,062,061
Area: 507 sq mi
Prince George’s County
Formed: 1696
County Seat: Upper Marlboro
Population: 967,201
Area: 498 sq mi
Queen Anne’s County
Formed: 1706
County Seat:Centreville
Population: 49,874
Area: 510 sq mi
Somerset County
Formed: 1666
County Seat: Princess Anne
Population: 24,620
Area: 611 sq mi
St. Mary’s County
Formed: 1637
County Seat: Leonardtown
Population: 113,777
Area: 611 sq mi
Talbot County
Formed: 1662
County Seat: Easton
Population: 37,526
Area: 477 sq mi
Washington County
Formed: 1776
County Seat:Hagerstown
Population: 154,705
Area: 468 sq mi
Wicomico County
Formed:1867
County Seat: Salisbury
Population: 103,588
Area: 400 sq mi
Worcester County
Formed:1742
County Seat: Snow Hill 1742
Population: 52,460
Area: 695 sq mi
There are 24 counties and county-equivalent in Maryland. The City of Baltimore in Maryland is considered a county rather than an independent city.
Most Maryland counties were named after relatives of the Barons Baltimore who were the proprietors of the Maryland colony from 1634 to 1771.
Below is a list of all the counties in Maryland.
Maryland Counties – List of Counties in Maryland (in Alphabetical order)
| County Name | County Seat | FIPS Code | Year Formed | Population (as of 2019) |
| Allegany County | Cumberland | 001 | 1789 | 70,416 |
| Anne Arundel County | Annapolis | 003 | 1650 | 579,234 |
| Baltimore County | Towson | 005 | 1659 | 827,370 |
| Baltimore City | Baltimore City | 510 | 1851 | 609,032 |
| Calvert County | Prince Frederick | 009 | 1654 | 92,525 |
| Caroline County | Denton | 011 | 1773 | 33,049 |
| Carroll County | Westminster | 013 | 1837 | 168,447 |
| Cecil County | Elkton | 015 | 1672 | 102,855 |
| Charles County | La Plata | 017 | 1658 | 163,257 |
| Dorchester County | Cambridge | 019 | 1668 | 31,929 |
| Frederick County | Frederick | 021 | 1748 | 259,547 |
| Garrett County | Oakland | 023 | 1872 | 29,235 |
| Harford County | Bel Air | 025 | 1773 | 255,441 |
| Howard County | Ellicott City | 027 | 1851 | 325,690 |
| Kent County | Chestertown | 029 | 1642 | 19,536 |
| Montgomery County | Rockville | 031 | 1776 | 1.051 million |
| Prince George’s County | Upper Marlboro | 033 | 1696 | 909,327 |
| Queen Anne’s County | Centreville | 035 | 1706 | 50,381 |
| Somerset County | Princess Anne | 039 | 1666 | 25,616 |
| St. Mary’s County | Leonardtown | 037 | 1637 | 113,510 |
| Talbot County | Easton | 041 | 1662 | 37,181 |
| Washington County | Hagerstown | 043 | 1776 | 151,049 |
| Wicomico County | Salisbury | 045 | 1867 | 103,609 |
| Worcester County | Snow Hill | 047 | 1742 | 52,276 |
1. Allegany County
Allegany County Maryland had a population of 70,416 (as of 2019) according to the U.S. Census Bureau. Its county seat is Cumberland.
This county is located in the northwestern part of Maryland. Its name “Allegany” comes from a local Lenape word “Welhik hane” or “oolikhanna” meaning best flowing river of the hills or beautiful stream.
It was established on December 25, 1789, and its largest city is Cumberland.
2. Anne Arundel County
Anne Arundel County’s population as of 2019 was 579,234. The county was established on April 9, 1650. Its county seat is Annapolis which is also Maryland’s capital.
Anne Arundel County was named after Lady Anne Arundell who was a member of the ancient family of Arundells in Cornwall England and also the wife of Cecilius Calvert the second Baron Baltimore.
This county’s largest community in Glen Burnie.
3. Baltimore County
This is the 3rd most populous county in Maryland with a population of 827,370 (as of 2019). Baltimore County is part of the Baltimore Metropolitan Area as well as part of the Northeast Metropolis Area.
Baltimore County was established June 30, 1659, and named after Cecil Calvert the second Baron Baltimore. Its county seat is Townson and its largest community in Dundalk.
4. Baltimore City
Baltimore City was formed in 1729 and became an independent city in 1851. As of 2019, it had a population of 609,032 making it one of the most populous cities in the United States. It is also the largest independent city in the United States.
5. Calvert County
Calvert County Maryland’s population as of 2019 was 92,525. Its name Calvert is derived from the family name of the Barons of Baltimore, the proprietors of the English colony of Maryland.
It was formed in 1654 and its county seat is Prince Frederick. The largest town in Calvert County is Chesapeake Beach.
6. Caroline County
This is a rural county located on the eastern shore of Maryland. Caroline County was established in 1774 and its county seat is Denton which is also the largest town in the county.
It is shares boundaries with Queen Anne’s County (to the north), Talbot County (to the west), Dorchester County (to the south), Kent County, Delaware (to the east), and Sussex County, Delaware (to the southeast).
7. Carroll County
Carroll County was formed on January 19, 1837, and was named after Charles Carroll of Carrolton. Its county seat is Westminster and its largest community is Eldersburg.
8. Cecil County
Cecil County Maryland is located in the northeastern part of Maryland and borders both Pennsylvania and Delaware.
It was established June 6, 1674, and named after Cecil Calvert the 2nd Baron Baltimore. Its county seat is Elkton which is also the largest town in Cecil County.
9. Charles County
Charles County was established April 13, 1658, and was named after Charles Calvert the third Baron Baltimore. Its county seat La Plata and its largest community are Waldorf.
Charles County is located in the southern part of Maryland and as of 2019 had a population of 163,257.
10. Dorchester County
Dorchester County was formed in 1669 and was named after Earl of Dorset a family friend of the Calverts (the proprietors of the Maryland colony).
Its county seat is Cambridge which is also the largest city. It is the largest county by total area on the Eastern Shore in the U.S. state of Maryland.
11. Frederick County
This is the county is located in the northern part of Maryland. It had a population of 259,547 (as of 2019). Frederick County was founded in 1748 and its county seat is Frederick.
Frederick County is home to the amazing Catoctin Mountain Park.
12. Garrett County
Garrett County is located in the western part of the U.S. state of Maryland. It was established on November 4, 1872, and named after John Work Garrett.
It is the third-least populous county in Maryland with a population of 29,235 (as of 2019). Its county seat is Oakland and its largest town is Mountain Lake Park.
13. Harford County
Bel Air is its county seat. Harford County was founded December 17, 1773, and named after Henry Harford the fifth proprietor of Maryland.
14. Howard County
Howard County was founded in 1838 and was named after John Eager Howard. Its county seat is Ellicott City and its largest community in Columbia.
15. Kent County
Kent County is the least populous county in Maryland with a population of 19,536. It was established in 1642 and was named after Kent a county in South England.
Its county seat is Chestertown which is also the largest town in the county.
16. Montgomery County
Montgomery County was founded in 1776 and was named after Richard Montgomery. As of 2019, it had a population of 1.051 million making it the most populous county in Maryland.
Its county seat is Rockville which is also the largest city.
17. Prince George’s County
Prince George’s County also abbreviated as PG County was founded on April 23, 1696. It was named after Prince George of Denmark.
It is the second-most populous county in Maryland with a population of 909,327 (as of 2019). Its county seat is Upper Marlboro and its largest city is Bowie.
18. Queen Anne’s County
Queen Anne’s County was founded in 1706 and was named after Queen Anne a queen of England, Scotland and Ireland in 1702-1707.
Its county seat is Centreville and its largest community is Stevensville.
19. Somerset County
This county is located in the southernmost part of Maryland. Somerset County was established in 1666 and was named after Mary, Lady Somerset.
Its county seat is Princess Anne which is also the largest town.
20. St. Mary’s County
St. Mary’s County was formed in 1637and was named after Mary the mother of Jesus. Its county seat is Leonardtown and the largest community in California.
St. Mary’s County was the home to the first Maryland Colony as well as the first capital of the Colony of Maryland.
St. Mary’s County is home to the Patuxent River, Naval Air Station, and St. Mary’s College of Maryland.
21. Talbot County
Talbot County was founded in 1661 and was named after Lady Grace Talbot the wife of Sir Robert Talbot an Anglo-Irish statesman and sister of Lord Baltimore Cecil Calvert.
Its county seat is Easton which is also the largest town.
22. Washington County
This county is located in the western part of Maryland. It was the first county in the United States to be named after the Revolution War general and later President George Washington.
Its county seat is Hagerstown which is also the largest municipality.
23. Wicomico County
Wicomico County was founded in 1867 and was named after the Wicomico River. Its county seat is Salisbury which is also the largest city in the county.
It is located in the southeastern part of Maryland and as of 2109 had a population of 103,609.
24. Worcester County
Worcester County was founded in 1742 and was named after the family of Marquees of Worcester. Its county seat is Snow Hill and its largest community in Ocean Pines.
There you have all the list of Maryland Counties. Hope you find this list helpful.
Summary
Writing on Maryland Counties was a good one. Maryland Counties are 23 in number and a list of them has been properly arranged in alphabetical order with including their Years of formation, County Seat, Population, and Area.
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