| # | Title | Rating | Length |
|---|
| 1 | Overture | | 0:59 |
| 2 | Oh, the Thinks You Can Think | | 3:52 |
| 3 | Horton Hears a Who | | 2:38 |
| 4 | Biggest Blame Fool | | 3:56 |
| 5 | Here on Who | | 6:00 |
| 6 | A Day for the Cat in the Hat | | 2:46 |
| 7 | It's Possibile (McElligot's Pool) | | 2:38 |
| 8 | How to Raise a Child | | 0:39 |
| 9 | The Military | | 3:07 |
| 10 | Alone in the Universe | | 4:49 |
| 11 | The One Feather Tail of Miss Gertrude McFuzz | | 1:17 |
| 12 | Amazing Mayzie | | 2:11 |
| 13 | Amazing Gertrude | | 2:12 |
| 14 | Monkey Around | | 1:50 |
| 15 | Chasing the Whos | | 2:47 |
| 16 | How Lucky You Are | | 1:40 |
| 17 | Notice Me Horton | | 3:07 |
| 18 | How Lucky You Are (Mayzie's reprise) | | 1:36 |
| 19 | Horton Sits on the Egg / Act 1 Finale | | 2:22 |
| 20 | Egg, Nest and Tree | | 1:40 |
| 21 | Mayzie in Palm Beach | | 2:17 |
| 22 | Alone in the Universe (reprise) | | 1:07 |
| 23 | Solla Sollew | | 3:31 |
| 24 | Havin' a Hunch | | 3:22 |
| 25 | All for You | | 3:38 |
| 26 | The People vs. Horton the Elephant | | 4:31 |
| 27 | Finale / Oh, the Thinks You Can Think | | 3:51 |
| 28 | Green Eggs and Ham (Curtain Call) | | 1:18 |