| Mode: | Basketball |
| Year: | 1930–31 |
| Team: | Illinois Fighting Illini |
| Conference: | Big Ten Conference |
| Short Conf: | Big Ten |
| Record: | 12–5 |
| Conf Record: | 7-5 |
| Asst Coach2: | Carl Voyles |
| Hc Year: | 9th |
| Ac1 Year: | 3rd |
| Ac2 Year: | 2nd |
| Captain: | Charles Harper |
The 1930–31 Illinois Fighting Illini men's basketball team represented the University of Illinois.
The 1930–31 season was head coach Craig Ruby's 9th at the University of Illinois, establishing the first time in the history of Illinois basketball that a head coach remained longer than 8 years. Ruby had 10 returning lettermen from a team that had finished in a fifth place tie in the Big Ten the year before. Even though they did not lose any non-conference games, the Fighting Illini showed no improvement in conference play by finishing with a record of 7 wins and 5 losses, however; the team improved to an overall record of 12 wins 5 losses. The starting lineup included captain Charles Harper, George Fencl and Elbert Kamp at forward, Elbridge May at center with Boyd Owen and Robert Kamp at the guard spots.[1]
|- !colspan=12 style="background:#DF4E38; color:white;"| Non-Conference regular season|- align="center" bgcolor=""
|- !colspan=9 style="background:#DF4E38; color:#FFFFFF;"|Big Ten regular season
Source[2]