Editing Frontier Conference (section)

===Former members===
The Frontier had four former full members, only one was a [[Private university|private]] school:

{| class="wikitable sortable" style="text-align:center"
! Institution
! Location
! Founded
! Affiliation
! Enrollment
! Nickname
! Joined{{efn|group=former|Represents the calendar year when fall sports competition begins.}}
! Left{{efn|group=former|Represents the calendar year when spring sports competition ends.}}
! Subsequent<br>conference(s)
! Current<br>conference
|-bgcolor=lightgreen
| '''[[Dickinson State University]]'''{{efn|group=former|Dickinson State will be returning to the Frontier for the 2025–26 academic year.}}
| [[Dickinson, North Dakota]]
| 1918
| [[Public university|Public]]
| 2,572
| [[Dickinson State Blue Hawks|Blue Hawks]]
| 2012
| 2014
| colspan="2" | [[North Star Athletic Association|North Star (NSAA)]]<br>(2014–25)
|-
| '''[[Lewis–Clark State College]]'''
| [[Lewiston, Idaho]]
| 1893
| rowspan="2" | [[Public university|Public]]
| 4,500
| [[Lewis–Clark State Warriors|Warriors]] &<br>[[Lewis–Clark State Lady Warriors|Lady Warriors]]
| 1998
| 2020
| colspan="2" | [[Cascade Collegiate Conference|Cascade (CCC)]]<br>(2020–present)
|-
| '''[[Montana State University Billings|Eastern Montana College]]'''{{efn|group=former|Currently known as Montana State University–Billings since 1994. Eastern Montana was the school name that reflected its use during conference membership.}}
| [[Billings, Montana]]
| 1927
| 4,600
| [[Montana State–Billings Yellowjackets|Yellowjackets]]
| 1933
| 1980
| various{{efn|group=former|Eastern Montana (now Montana State–Billings) had joined the following subsequent conferences: as an [[NCAA Division II independent schools|NCAA D-II Independent]] from 1980–81 to 1981–82; the [[Pacific West Conference]]{{efn|group=former|name=D2|Currently an [[NCAA Division II]] athletic conference.}} (PacWest) from 1982–83 to 2004–05 (originally known as the '''Great Northwest Conference''' from 1982–83 to 1991–92); and the [[Heartland Conference]]{{efn|group=former|name=D2}} from 2005–06 to 2006–07.}}
| [[Great Northwest Athletic Conference|Great Northwest (GNAC)]]{{efn|group=former|name=D2}}<br>(2007–present)
|-
| '''[[Westminster University (Utah)|Westminster College]]'''{{efn|group=former|Currently known as Westminster University since 2023.}}
| [[Salt Lake City|Salt Lake City, Utah]]
| 1875
| [[Nonsectarian]]
| 3,108
| [[Westminster Griffins|Griffins]]
| 1998
| 2015
| colspan="2" | [[Rocky Mountain Athletic Conference|Rocky Mountain (RMAC)]]{{efn|group=former|name=D2}}<br>(2015–present)
|}

;Notes:
{{notelist|group=former}}