History
1993-1997
| mark-size1=10
| mark-title1=Arrowhead
| mark-coord1= | mark-description1=Location:
| shape-color1=#69b3e7 | shape1=circle
| mark-title2=Kenosha Bradford
| mark-coord2= | mark-description2=Location:
| shape-color2=#9d2235 | shape2=circle
| mark-title3=Kenosha Tremper
| mark-coord3= | mark-description3=Location:
| shape-color3=#0032a0 | shape3=circle
| mark-title4=Kettle Moraine
| mark-coord4= | mark-description4=Location:
| shape-color4=#ffc72c | shape4=circle
| mark-title5=Mukwonago
| mark-coord5= | mark-description5=Location:
| shape-color5=#005eb8 | shape5=circle
| mark-title6=Muskego
| mark-coord6= | mark-description6=Location:
| shape-color6=#ba0c2f | shape6=circle
| mark-title7=Nathan Hale
| mark-coord7= | mark-description7=Location:
| shape-color7=#115740 | shape7=circle
| mark-title8=Oak Creek
| mark-coord8= | mark-description8=Location:
| shape-color8=#a2aaad | shape8=circle
| mark-title9=Racine Case
| mark-coord9= | mark-description9=Location:
| shape-color9=#b3a369 | shape9=circle
| mark-title10=Racine Horlick
| mark-coord10= | mark-description10=Location:
| shape-color10=#9d2235 | shape10=circle
| mark-title11=Racine Park
| mark-coord11= | mark-description11=Location:
| shape-color11=#e35205 | shape11=circle
| mark-title12=Waukesha North
| mark-coord12= | mark-description12=Location:
| shape-color12=#582c83 | shape12=circle
| mark-title13=Waukesha South
| mark-coord13= | mark-description13=Location:
| shape-color13=#000000 | shape13=circle
| mark-title14=Waukesha West
| mark-coord14= | mark-description14=Location:
| shape-color14=#a2aaad | shape14=circle
| mark-title15=West Allis Central
| mark-coord15= | mark-description15=Location:
| shape-color15=#6f2c3f | shape15=circle
| auto-caption=
The Southeast Conference was formed in 1993 as a fifteen-member superconference, taking all of its schools from three recently disbanded conferences. Five members came from the Big Nine (Kenosha Bradford, Kenosha Tremper, Racine Case, Racine Horlick and Racine Park), five from the Suburban Park (Kettle Moraine, Muskego, Nathan Hale, Oak Creek and West Allis Central) and four from the Braveland (Arrowhead, Mukwonago, Waukesha North and Waukesha South). The recently opened Waukesha West High School, which would have become Braveland Conference members but for its dissolution, rounded out the original membership roster of the Southeast Conference. Schools were subdivided by geography along previous conference alignments, and schedules were weighted to give more games to divisional opponents:
| Central Division | South Division | West Division |
|---|
| Kettle Moraine | Kenosha Bradford | Arrowhead |
| Muskego | Kenosha Tremper | Mukwonago |
| Nathan Hale | Racine Case | Waukesha North |
| Oak Creek | Racine Horlick | Waukesha South |
| West Allis Central | Racine Park | Waukesha West |
1997-2009
| mark-size1=10
| mark-title1=Burlington
| mark-coord1= | mark-description1=Location:
| shape-color1=#e35205 | shape1=circle
| mark-title2=Franklin
| mark-coord2= | mark-description2=Location:
| shape-color2=#b3a369 | shape2=circle
| mark-title3=Kenosha Bradford
| mark-coord3= | mark-description3=Location:
| shape-color3=#9d2235 | shape3=circle
| mark-title4=Kenosha Tremper
| mark-coord4= | mark-description4=Location:
| shape-color4=#0032a0 | shape4=circle
| mark-title5=Muskego
| mark-coord5= | mark-description5=Location:
| shape-color5=#ba0c2f | shape5circle
| mark-title6=Oak Creek
| mark-coord6= | mark-description6=Location:
| shape-color6=#a2aaad | shape6=circle
| mark-title7=Racine Case
| mark-coord7= | mark-description7=Location:
| shape-color7=#115740 | shape7=circle
| mark-title8=Racine Horlick
| mark-coord8= | mark-description8=Location:
| shape-color8=#9d2235 | shape8=circle
| mark-title9=Racine Park
| mark-coord9= | mark-description9=Location:
| shape-color9=#e35205 | shape9=circle
| mark-title10=South Milwaukee
| mark-coord10= | mark-description10=Location:
| shape-color10=#000000 | shape10=circle
| auto-caption=
After a few years of competition, most of the schools in the Central and West Divisions were unhappy with the long travel distances experienced with facing schools in Racine and Kenosha. In addition, the WIAA approved a merger with the Wisconsin Independent Schools Athletic Association (an organization for private school athletics) to begin in 1997. In the wake of these developments, another round of realignment was approved for the high school conferences in southeastern Wisconsin. Two new conferences were created (Classic 8 and Greater Metro), and the Southeast Conference lost members to both of them. Six schools (Arrowhead, Kettle Moraine, Mukwonago, Waukesha North, Waukesha South and Waukesha West) joined the Classic 8, and two joined the Greater Metro (Nathan Hale and West Allis Central). The remaining seven schools accepted three new members into the Southeast Conference: two from the Woodland Conference (Franklin and South Milwaukee) and one from the Southern Lakes Conference (Burlington). The ten schools of the Southeast Conference were aligned into Northern and Southern divisions:
| Northern Division | Southern Division |
|---|
| Burlington | Kenosha Bradford |
| Franklin | Kenosha Tremper |
| Muskego | Racine Case |
| Oak Creek | Racine Horlick |
| South Milwaukee | Racine Park |
2009-present
Within a few years after the Southeast Conference was realigned in 1997, the two smallest schools (Burlington and South Milwaukee) began to voice their displeasure at the long travel distances and competitive imbalance they faced as members. Both schools rejoined their former conferences in 2009, with Burlington returning to the Southern Lakes Conference and South Milwaukee reuniting with the Woodland Conference. The Southeast Conference dropped divisional alignments to compete as a single entity with the reduction to eight members. In 2012, Muskego left to join the Classic 8 Conference after the Kenosha Unified School District added a third high school on the west side of the city (Indian Trail High School and Academy). In 2025, Oak Creek left to become members of the Classic 8 Conference, decreasing the Southeast Conference's roster to seven schools.
In February 2019, in conjunction with the Wisconsin Football Coaches Association, the WIAA released a sweeping football-only realignment for Wisconsin to commence with the 2020 football season and run on a two-year cycle. The Southeast Conference was one of the few conferences in the state that stayed entirely intact after the realignment, but this will no longer be the case for the 2026-2027 realignment cycle. Oak Creek will be joining the Classic 8 (one year after becoming a full member) and Franklin is aligning with the Greater Metro Conference. Westosha Central will be moving over from the Southern Lakes Conference as a replacement, and with both conferences having seven football members, the Southeast and Southern Lakes Conferences will enter a scheduling partnership. This partnership mandates that one crossover game per school per season must be played, with the results included in the respective schools won-loss record in conference play.
Membership timeline
Full members
DateFormat = yyyy
ImageSize = width:900 height:auto barincrement:20
Period = from:1993 till:2030
TimeAxis = orientation:horizontal
PlotArea = right:30 left:0 bottom:50 top:5
Colors = id:barcolor value:rgb(0.99,0.7,0.7)
id:line value:black
id:bg value:white
PlotData=
width:15 textcolor:black shift:(5,-5) anchor:from fontsize:m
bar:1 color:powderblue from:1993 till:1997 text:Arrowhead (1993-1997)
bar:2 color:skyblue from:1993 till:1997 text:Kenosha Bradford (1993-present)
bar:2 color:coral from:1997 till:2009 text:
bar:2 color:tan1 from:2009 till:2030 text:
bar:3 color:skyblue from:1993 till:1997 text:Kenosha Tremper (1993-present)
bar:3 color:coral from:1997 till:2009 text:
bar:3 color:tan1 from:2009 till:2030 text:
bar:4 color:blue from:1993 till:1997 text:Kettle Moraine (1993-1997)
bar:5 color:powderblue from:1993 till:1997 text:Mukwonago (1993-1997)
bar:6 color:blue from:1993 till:1997 text:Muskego (1993-2012)
bar:6 color:red from:1997 till:2009 text:
bar:6 color:tan1 from:2009 till:2012 text:
bar:7 color:blue from:1993 till:1997 text:Nathan Hale (1993-1997)
bar:8 color:blue from:1993 till:1997 text:Oak Creek (1993-2025)
bar:8 color:red from:1997 till:2009 text:
bar:8 color:tan1 from:2009 till:2025 text:
bar:9 color:skyblue from:1993 till:2030 text:Racine Case (1993-present)
bar:9 color:coral from:1997 till:2009 text:
bar:9 color:tan1 from:2009 till:2030 text:
bar:10 color:skyblue from:1993 till:2030 text:Racine Horlick (1993-present)
bar:10 color:coral from:1997 till:2009 text:
bar:10 color:tan1 from:2009 till:2030 text:
bar:11 color:skyblue from:1993 till:2030 text:Racine Park (1993-present)
bar:11 color:coral from:1997 till:2009 text:
bar:11 color:tan1 from:2009 till:2030 text:
bar:12 color:powderblue from:1993 till:1997 text:Waukesha North (1993-1997)
bar:13 color:powderblue from:1993 till:1997 text:Waukesha South (1993-1997)
bar:14 color:powderblue from:1993 till:1997 text:Waukesha West (1993-1997)
bar:15 color:blue from:1993 till:1997 text:West Allis Central (1993-1997)
bar:16 color:red from:1997 till:2009 text:Burlington (1997-2009)
bar:17 color:red from:1997 till:2009 text:Franklin (1997-present)
bar:17 color:tan1 from:2009 till:2030 text:
bar:18 color:red from:1997 till:2009 text:South Milwaukee (1997-2009)
bar:19 color:tan1 from:2012 till:2030 text:Kenosha Indian Trail (2012-present)
ScaleMajor = gridcolor:line unit:year increment:5 start:1993
DateFormat = yyyy
ImageSize = width:900 height:auto barincrement:20
Period = from:2020 till:2030
TimeAxis = orientation:horizontal
PlotArea = right:30 left:0 bottom:50 top:5
Colors = id:barcolor value:rgb(0.99,0.7,0.7)
id:line value:black
id:bg value:white
PlotData=
width:15 textcolor:black shift:(5,-5) anchor:from fontsize:m
bar:1 color:lavender from:2020 till:2026 text:Franklin (2020-2025)
bar:2 color:lavender from:2020 till:2030 text:Kenosha Bradford (2020-present)
bar:3 color:lavender from:2020 till:2030 text:Kenosha Indian Trail (2020-present)
bar:4 color:lavender from:2020 till:2030 text:Kenosha Tremper (2020-present)
bar:5 color:lavender from:2020 till:2026 text:Oak Creek (2020-2025)
bar:6 color:lavender from:2020 till:2030 text:Racine Case (2020-present)
bar:7 color:lavender from:2020 till:2030 text:Racine Horlick (2020-present)
bar:8 color:lavender from:2020 till:2030 text:Racine Park (2020-present)
bar:9 color:lavender from:2026 till:2030 text:Westosha Central (2026-future))
ScaleMajor = gridcolor:line unit:year increment:1 start:2020