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Maryland County List
Workplaces are grouped by county. Each workplace name is followed by the owner's surname(s). Places without formal names are given the owner's name. Counties formed after 1865 are omitted.

ALLEGANY

Formed in 1789 from Washington Co.

ANNE ARUNDEL

Formed in 1650

Doughoregan Manor - (a.k.a. The House of Kings), Carroll
Homewood Plantation - Carroll
Stephen Lee Plantation - Lee
Poplar Knowle - Talbott
Whitehall Plantation - Ridout

BALTIMORE

Formed in 1659

BALTIMORE CITY

Formed in 1729 from Baltimore Co.

CALVERT

Patuxent Co. renamed Calvert Co. in 1654

CAROLINE

Formed in 1773 from Dorchester and Queen Anne's Co.'s

CARROLL

Formed in 1837 from Baltimore and Frederick Co.'s

CECIL

Formed in 1674 from Baltimore and Kent Co.'s

CHARLES

Formed in 1658

DORCHESTER

Formed in 1668(?)Edward Brodess Farm - Brodess

Anthony Thompson Plantation - Thompson

FREDERICK

Formed in 1748 from Prince George's Co.

HARTFORD

Formed in 1773 from Baltimore Co.

HOWARD

Formed in 1851 from Anne Arundel and Baltimore Co.'s

KENT

Formed in 1642

MONTGOMERY

Formed in 1776 from Frederick Co.

PRINCE GEORGE'S

Formed in 1695 from Charles and Calvert Co.

Woodlawn Plantation - Beall

QUEEN ANNE'S

Formed in 1706 from Talbot Co.

ST. MARY'S

Formed in 1637

Cole Plantation - Cole

SOMERSET

Formed in 1666

TALBOT

Formed in 1662 from Kent Co.

WASHINGTON