Isaac Newton Mack was a merchant and political figure in Nova Scotia

Nova Scotia

Nova Scotia is one of Canada's three Maritime provinces and is the most populous province in Atlantic Canada. The name of the province is Latin for "New Scotland," but "Nova Scotia" is the recognized, English-language name of the province. The provincial capital is Halifax. Nova Scotia is the...

, Canada. He represented Queen's County in the Nova Scotia House of Assembly

Nova Scotia House of Assembly

The Nova Scotia Legislature, consisting of Her Majesty The Queen represented by the Lieutenant Governor and the House of Assembly, is the legislative branch of the provincial government of Nova Scotia, Canada...

 from 1874 to 1878 as a Liberal

Liberal Party of Nova Scotia

The Liberal Party of Nova Scotia is a political party in Nova Scotia, Canada.-Origins:The party is descended from the pre-Confederation Reformers in Nova Scotia who coalesced around Joseph Howe demanding the institution of responsible government...

 member.

He was born in Mill Village, Nova Scotia, of United Empire Loyalist descent, and was educated there and at Sackville

Sackville, Nova Scotia

Sackville can refer to several different communities in the Canadian province of Nova Scotia located along the Sackville River. No community has simply "Sackville" as an official name.* Lower Sackville* Middle Sackville* Upper Sackville...

. In 1872, he married Rachel Vaughan. Mack was chosen as speaker for the provincial assembly in 1877.