People with the last name Ocallahan in Illinois
- Ali Ocallahan
- Andrew Ocallahan
- D Ocallahan
- Deborah Ocallahan
- Dennis Ocallahan
- Eileen Ocallahan
- Emily Ocallahan
- Jack Ocallahan
- Janet Ocallahan
- John Ocallahan
- Jr Ocallahan
- Judith Ocallahan
- Kathleen Ocallahan
- Kevin Ocallahan
- Mary Ocallahan
- Matilda Ocallahan
- Megan Ocallahan
- Melanie Ocallahan
- Michael Ocallahan
- Mike Ocallahan
- Nikki Ocallahan
- Patrick Ocallahan
- Rachael Ocallahan
- Roseanne Ocallahan
- Stacy Ocallahan
- Sue Ocallahan
- Teresa Ocallahan
- Terrence Ocallahan
- Terry Ocallahan
- Tim Ocallahan
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