# Northern Illinois-Iowa Conference

The Northern Illinois-Iowa Conference (NIIC) was a college athletic conference affiliated with the National Collegiate Athletic Association (NCAA) at the Division III level. Member schools transitioned from the NAIA ranks during the early 1980s. The conference was formed in 1969. Member institutions were located in the Midwestern United States in the states of Illinois and Iowa. After the 2005–06 academic year, the NIIC merged with the Lake Michigan Conference to form a new league called the Northern Athletics Conference (now known as the Northern Athletics Collegiate Conference).

## Member schools
### Final members

| Institution | Location | Founded | Affiliation | Enrollment | Nickname | Joined | Left | Subsequent conference(s) | Current conference |
| Aurora University | Aurora, Illinois | 1893 | Nonsectarian | 2,309 | Spartans | 1970 | 2006 | Northern (NACC) (2006–present) | Northern (NACC) (2006–present) |
| Benedictine University | Lisle, Illinois | 1887 | Catholic (Benedictines) | 2,740 | Eagles | 1969 | 2006 | Northern (NACC) (2006–present) | Northern (NACC) (2006–present) |
| Clarke University | Dubuque, Iowa | 1843 | Catholic (B.V.M.) | 1,075 | Crusaders | 1988 | 2006 | NAIA Independent (2006–07; 2015–16) Midwest (MCC) (2007–15) | Heart of America (HAAC) (2016–present) |
| Concordia University Chicago | River Forest, Illinois | 1864 | Lutheran LCMS | 1,361 | Cougars | 1969 | 2006 | Northern (NACC) (2006–present) | Northern (NACC) (2006–present) |
| Dominican University | River Forest, Illinois | 1901 | Catholic (Dominican) | 1,697 | Stars | 1990 | 2005 | Lake Michigan (LMC) (2005) | Northern (NACC) (2006–present) |
| Eureka College | Eureka, Illinois | 1855 | Disciples of Christ | 680 | Red Devils | 1996 | 2006 | St. Louis (SLIAC) (2006–present) | St. Louis (SLIAC) (2006–present) |
| Rockford University | Rockford, Illinois | 1847 | Nonsectarian | 1,272 | Regents | 1969 | 2006 | Northern (NACC) (2006–present) | Northern (NACC) (2006–present) |

#### Notes

* 1 2 3 4 Charter member.
* ↑ Clarke is now competing as the Pride since the 2017–18 school year.
* ↑ Currently an NAIA athletic conference.

### Former members

| Institution | Location | Founded | Affiliation | Enrollment | Nickname | Joined | Left | Subsequent conference(s) | Current conference |
| George Williams College | Williams Bay, Wisconsin | 1890 | Nondenominational | N/A | Indians | 1970 | 1971 | N/A | N/A |
| Judson University | Elgin, Illinois | 1963 | Evangelical Christian | 1,231 | Eagles | 1973 | 1996 | Chicagoland (CCAC) (1996–present) | Chicagoland (CCAC) (1996–present) |
| Olivet Nazarene University | Bourbonnais, Illinois | 1907 | Nazarene | 4,579 | Tigers | 1974 | 1996 | Chicagoland (CCAC) (1996–present) | Chicagoland (CCAC) (1996–present) |
| Trinity International University | Deerfield, Illinois | 1897 | Evangelical Christian | 2,688 | Trojans | 1969 | 1996 | Chicagoland (CCAC) (1996–2023) | N/A |

#### Notes

* 1 2 3 Charter member.
* ↑ George Williams closed and was merged into Aurora University in 2000.
* 1 2 3 Currently an NAIA athletic conference.
* ↑ Trinity International closed their residential campus after 2022–2023 school year and now it only have online modalities.