Adam Brown Crosby (May 12, 1859 – March 10, 1921) was a politician in Nova Scotia, Canada.^[1]

Born in Belfast Ireland, he emigrated as a child with his parents, Adam Crosby and Jane Brown, and settled first at Sydney Mines and then Cow Bay (Port Morien) Nova Scotia. His father worked at the Gowrie Mine in Port Morien that would later employ Adam and Adam's brother James. Realizing that mining was not for him, Adam B. Crosby moved to Halifax in 1880 and worked as a sales clerk and then as a ship broker. He was elected several times as mayor of Halifax, serving from 1902 to 1905, and again from 1908 to 1909.^[2] He was elected as the Conservative Member of Parliament for Halifax on October 26, 1908, serving one term before being defeated in the general election of September 21, 1911. Sir Robert Borden, Prime Minister of Canada, appointed Crosby to the Senate on January 20, 1917, upon the death of Senator William MacDonald, after whom Glace Bay's "Senator's Corner" is named.^[3] Senator Crosby served in the Senate for seven years until his death on March 10, 1921.^[4][5]

v t e 1911 Canadian federal election: Halifax
Party	Candidate	Votes	%	Elected
	Conservative	Robert Borden	7,040	25.46	Y
	Liberal	Alexander Kenneth Maclean	6,946	25.12	Y
	Liberal	Edward Blackadder	6,879	24.88
	Conservative	Adam Brown Crosby	6,787	24.54
Total valid votes			27,652	100.00
Source(s) "Halifax (1867- )". History of Federal Ridings Since 1867. Library of Parliament. Retrieved 24 March 2020. Two members were elected from the district.

v t e 1908 Canadian federal election: Halifax
Party	Candidate	Votes	%	Elected
	Conservative	Robert Borden	7,386	26.80	Y
	Conservative	Adam Brown Crosby	7,115	25.82	Y
	Liberal	William Roche	6,635	24.08
	Liberal	Michael Carney	6,423	23.31
Total valid votes			27,559	100.00
Source(s) "Halifax (1867- )". History of Federal Ridings Since 1867. Library of Parliament. Retrieved 24 March 2020. Two members were elected from the district.

• Adam Brown Crosby – Parliament of Canada biography