Mayo-Tatchun is an electoral district which returns an MLA to the Legislative Assembly of the Yukon Territory in Canada. It is an amalgamation of the former Mayo and Tatchun electoral districts. Mayo-Tatchun is currently one of the Yukon's eight rural ridings. It includes the communities of Carmacks, Pelly Crossing, Mayo, Stewart Crossing, and Keno City. The riding includes the traditional territory of the Selkirk First Nation, the First Nation of Na-Cho Nyäk Dun, and the Little Salmon/Carmacks First Nation. It is bordered by the ridings of Vuntut Gwitchin, Klondike, Lake Laberge, Kluane, and Pelly-Nisutlin.

Members of the Legislative Assembly

Electoral results

2021

2016

! align left colspan=3|Total ! align=right| 730 ! align=right| 100.0% ! align=right| –

2011

! align left colspan=3|Total ! align=right| 677 ! align=right| 100.0% ! align=right| –

2006

! align=left colspan=3|Total ! align=right|566 ! align=right|100.0% ! align=right| –

2002

! align=left colspan=3|Total ! align=right|687 ! align=right|100.0% ! align=right| –

2000

! align=left colspan=3|Total ! align=right|723 ! align=right|100.0% ! align=right| –

1996

! align=left colspan=3|Total ! align=right|634 ! align=right|100.0% ! align=right| –

1992

! align=left colspan=3|Total ! align=right| 660 ! align=right| 100.0% ! align=right| –