People with the last name MacWilliams in Illinois
- Barbara MacWilliams
- Bronwyn MacWilliams
- Carlos MacWilliams
- Carol MacWilliams
- Colby MacWilliams
- Corey MacWilliams
- David MacWilliams
- Diane MacWilliams
- Douglas MacWilliams
- Dylan MacWilliams
- Emily MacWilliams
- Joshua MacWilliams
- Katherine MacWilliams
- Kevin MacWilliams
- Lina MacWilliams
- Mac MacWilliams
- Mary MacWilliams
- Nadine MacWilliams
- Richard MacWilliams
- Scot MacWilliams
- William MacWilliams
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