People with the last name Usui in Illinois
- Akiko Usui
- Anita Usui
- Eriko Usui
- Eugene Usui
- Fumio Usui
- Hideaki Usui
- Hidehiro Usui
- Hiromi Usui
- Hiroshi Usui
- Joshihiro Usui
- Kenji Usui
- Kuniyasu Usui
- Mami Usui
- Masaaki Usui
- Nobuko Usui
- Noriko Usui
- Satomi Usui
- Satoshi Usui
- Shuzo Usui
- Tadashi Usui
- Takehiko Usui
- Toru Usui
- Tsuyoshi Usui
- Wahei Usui
- Yoko Usui
- Yoshihiro Usui
- Yoshinori Usui
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