Lake Athletic Conference Membership Membership

| School | Location_ | Mascot | County | Year_Joined | Previous_Conference | Year_Left | Conference_Joined |
|---|---|---|---|---|---|---|---|
| Hammond Clark | Hammond | Pioneers | 45 Lake | 1969 | Northwestern | 2007 | Great Lakes |
| Hammond Gavit | Hammond | Gladiators | 45 Lake | 1969 | Northwestern | 2007 | Great Lakes |
| Hammond | Hammond | Wildcats | 45 Lake | 1969 | Northwestern | 2007 | Great Lakes |
| Hammond Morton | Hammond | Governors | 45 Lake | 1969 | Northwestern | 2007 | Great Lakes |
| East Chicago Roosevelt | East Chicago | Roughriders | 45 Lake | 1969 | Northwestern | 1986 | none (consolidated into East Chicago Central ) |
| Hammond Tech | Hammond | Tigers | 45 Lake | 1969 | Northwestern | 1981 | none (school closed) |
| East Chicago Washington | East Chicago | Senators | 45 Lake | 1969 | Northwestern | 1986 | none (consolidated into East Chicago Central ) |