People with the last name Cassingham in Oklahoma
- Alvin Cassingham
- Arthur Cassingham
- Bill Cassingham
- Billy Cassingham
- Cat Cassingham
- Cathy Cassingham
- Cindi Cassingham
- Cynthia Cassingham
- Deana Cassingham
- Earl Cassingham
- Gary Cassingham
- Gloria Cassingham
- Heather Cassingham
- Lee Cassingham
- Merlyne Cassingham
- Michael Cassingham
- Robert Cassingham
- Sarah Cassingham
- Shirley Cassingham
- Terry Cassingham
- Traci Cassingham
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