Census data was accessed from the University of Virginia Historical Census Browser.

County	Total Population	Total No. Male Slaves	Total No. Female Slaves	Total No. Slaves	Total No. Free Black Males	Total No. Free Black Female	Total No. Free Blacks
ALLEGANY	10,609	434	384	818	117	105	222
ANNE ARUNDEL	28,295	5,496	4,851	10,347	1,988	2,088	4,076
BALTIMORE	33,292			6,160			2,460
BALTIMORE CITY	75,661	(5,185 - BA)	(5,468 - BA)	4,493	(7,724 - BA)	(10,164 - BA)	13,882
CALVERT	8,900	1,958	1,941	3,899	581	632	1,213
CAROLINE	9,070	629	548	1,177	786	866	1,652
CECIL	15,432	893	812	1,705	1,143	1,106	2,249
CHARLES	17,769	5,099	5,030	10,129	422	429	851
DORCHESTER	18,686	2,624	2,377	5,001	1,486	1,514	3,000
FREDERICK	45,789	3,431	2,939	6,370	1,353	1,363	2,716
HARFORD	16,319	1,517	1,430	2,947	1,049	1,009	2,058
KENT	10,501	1,768	1,423	3,191	1,148	1,118	2,266
MONTGOMERY	19,816	3,361	3,086	6,447	588	678	1,266
PRINCE GEORGE'S	20,474	5,857	5,728	11,585	586	616	1,202
QUEEN ANNE'S	14,397	2,530	2,342	4,872	1,362	1,504	2,866
SOMERSET	20,166	3,550	3,006	6,556	1,051	1,188	2,239
ST MARY'S	13,459	3,153	3,030	6,183	628	551	1,179
TALBOT	12,947	2,168	2,005	4,173	1,208	1,275	2,483
WASHINGTON	25,268	1,584	1,325	2,909	542	540	1,082
WORCESTER	18,273	2,205	1,827	4,032	1,144	1,286	2,430
TOTAL	435,123	48,257	44,084	102,994	17,182	17,868	51,392