| Robert Preston | Harold Hill |
| Shirley Jones | Marian Paroo |
| Buddy Hackett | Marcellus Washburn |
| Hermione Gingold | Eulalie Mackechnie Shinn |
| Paul Ford | Mayor George Shinn |
| Pert Kelton | Mrs. Paroo |
| The Buffalo Bills | Themselves |
| Timmy Everett | Tommy Djilas |
| Susan Luckey | Zaneeta Shinn |
| Ron Howard | Winthrop Paroo |
| Director | Morton DaCosta |
| Producer | Morton DaCosta; Joel Freeman |
| Writer | Meredith Willson; Franklin Lacey |
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