Donald David McDonald was a farmer and political figure in Prince Edward Island

Prince Edward Island

Prince Edward Island is a Canadian province consisting of an island of the same name, as well as other islands. The maritime province is the smallest in the nation in both land area and population...

. He represented 3rd Queens

3rd Queens

3rd Queens was an electoral district in the Canadian province of Prince Edward Island, which elected two members to the Legislative Assembly of Prince Edward Island from 1873 to 1993.The district comprised the northeastern portion of Queens County....

 in the Legislative Assembly of Prince Edward Island

Legislative Assembly of Prince Edward Island

The Legislative Assembly of Prince Edward Island, along with the Lieutenant-Governor, forms the parliament of the province. The General Assembly meets at Province House, which is located at the intersection of Richmond and Great George Streets in Charlottetown....

 from 1916 to 1923 and from 1928 to 1931 as a Liberal

Prince Edward Island Liberal Party

The Prince Edward Island Liberal Party is a major political party in the province of Prince Edward Island, Canada. The PEI Liberals are aligned with the federal Liberal Party of Canada. The party is led by Robert Ghiz, a former member of the staff of the Prime Minister's Office under Prime Minister...

.

He was the son of Donald A. McDonald and was educated in Glenfinnan, Prince Edward Island. He was married twice: to Mary J. McIntyre in 1894 and to Mary McDonald in 1924. McDonald served as census commissioner for Queens County

Queens County, Prince Edward Island

Queens County is located in central Prince Edward Island, Canada. The county is geographically divided by the Hillsborough River's estuary, a tidal inlet which almost splits the county and Prince Edward Island...

 in 1901 and 1911. He also served as a justice of the peace

Justice of the Peace

A justice of the peace is a puisne judicial officer elected or appointed by means of a commission to keep the peace. Depending on the jurisdiction, they might dispense summary justice or merely deal with local administrative applications in common law jurisdictions...

. McDonald was defeated when he ran for a seat in the provincial assembly in 1912 and when he ran for reelection in 1923. He served in the province's Executive Council as a minister without portfolio

Minister without Portfolio

A minister without portfolio is either a government minister with no specific responsibilities or a minister that does not head a particular ministry...

. McDonald was speaker for the legislative assembly from 1928 to 1931. He died in Glenfinnan at the age of 77.