| Office1: | Minister of Crown Services |
| Term Start1: | August 1, 2018 |
| Term End1: | September 25, 2019 |
| Premier1: | Brian Pallister |
| Predecessor1: | Cliff Cullen |
| Successor1: | Jeff Wharton |
| Office2: | Member of the Legislative Assembly of Manitoba for St. Vital |
| Term Start2: | April 19, 2016 |
| Term End2: | August 12, 2019 |
| Predecessor2: | Nancy Allan |
| Successor2: | Jamie Moses |
| Party: | Progressive Conservative |
| Residence: | Winnipeg, Manitoba |
Colleen Mayer is a former Canadian politician and member of the Legislative Assembly of Manitoba, who represented the electoral district of St. Vital as a member of the Progressive Conservative Party of Manitoba from 2016 until 2019.[1] St. Vital was an open seat in the 2016 Manitoba general election, with incumbent MLA Nancy Allan not seeking re-election.
On August 1, 2018, Premier Brian Pallister appointed Mayer to the Executive Council of Manitoba as Minister of Crown Services.[2]
Mayer lost her seat in the 2019 election to New Democrat Jamie Moses, who contested the seat in 2016. She subsequently accepted a position with STARS Air Ambulance as the Director of Development for Manitoba.