Alexander Duncan McEachern (born September 27, 1939) is a former provincial level politician from Alberta, Canada. He served as a member of the Legislative Assembly of Alberta from 1986 to 1993.^[1]

McEachern ran for political office for the first time in the 1975 Alberta general election. He ran in the electoral district of Edmonton-Glenora as a candidate for the New Democrats but was badly defeated by incumbent cabinet minister Lou Hyndman.^[2]

He made a second attempt to run for office in the 1979 general election in the Edmonton-Kingsway electoral district.^[3] This time he finished second to incumbent Progressive Conservative MLA Kenneth Paproski. He attempted a third run for office in the 1982 Alberta general election with another second-place finish slightly improving his vote total to Progressive Conservative candidate Carl Paproski.^[4]

McEachern won his fourth attempt for public office, defeating three other candidates in the 1986 Alberta general election.^[5] He was re-elected for a second and final term in the 1989 Alberta general election. His majority was reduced. but he still defeated the other two candidates with a comfortable margin.^[6] Edmonton-Kingsway was abolished due to redistribution in 1993. McEachern ran in the new electoral district of Edmonton-Mayfield for the 1993 Alberta general election. He was defeated by Liberal candidate Lance White.^[7]

McEachern is still active with the Alberta New Democrats. serving as the President of the Lesser Slave Lake electoral district.^{[citation needed]}