| Nbr | Name | Size | Owner | Owner# | Lessee | Lessee# |
| 1964 | ZACHARY TAYLOR | 16 | Ozz Enterprises | 3112 | | |
| 6161 | Zachary Wadsworth | 13.1 1/2 | Wadsworth Equestrian | 9439 | | |
| 8804 | Zahnya | 16.2 | Lisa Clements | 17146 | | |
| 6818 | Zaine | 17.2 | Andrea Stephens | 16117 | | |
| 2715 | ZAMIRO | 17.1 | Jay Shuttleworth | | | |
| 615 | Zamundo | 16.2 | Brad Federico | 2354 | | |
| 388 | Zantura | 16.2 | Erin Hosselbeck | | Adison Rice | 8031 |
| 3775 | ZAPPA | 15.1 | Anna Jane Woodard | | | |
| 6478 | Zarrageous | 15.2 | Deborah Kline | 9798 | | |
| 460 | Zarrageous | 15.2 | Mollie McWhorter | 17137 | Louis McWhorter | |
| 2345 | ZAVANA | 17.2 | Cynthia A. Wilberding | | | |
| 4038 | ZELLA | 15.1 | | 6437 | | |
| 4730 | ZEN | 16 | Meadow Hill Stables | 6207 | | |
| 629 | Zenzero | 15.3 | Lauren Hancock | 1891 | | |
| 1528 | ZEPHYR | 15.1 | Webb Farm | 2339 | | |
| 4224 | ZEPHYR | 16.3 | Jessica Brittenham | 6407 | | |
| 8977 | Zetterberg | 16.2 | Townsend Farm | 7715 | | |
| 2653 | ZEUS | 16.1 | Harmony Farm | 3067 | | |
| 418 | Zeus | 16.2 | Sophia Strahan | 17055 | Jean Strahan | |
| 6342 | Ziggy Stardust | 13.0 1/2 | Laurie Occhipinti | 9674 | Sydney Monckton | 9214 |
| 1248 | ZIGGY STARDUST | 15.3/4 | Linda B. Blackford | | | |
| 3529 | ZINFANDEL | 15.2 | Whitney Brooks | 5982 | | |
| 3296 | ZIP | 16.3 | Carver Camp Weaver | 3205 | | |
| 4455 | ZIPPED ABIT | 15.2 | Teresa Plemmons | | | |
| 394 | Zoolander | 14.1 3/4 | Madison Parker Spangle | | Ashleigh Colantuoni | 9028 |
| 1582 | ZOOM | 16.3 | | | | |
| 6212 | Zoot Alors | | Lee Heelan | 114 | | |
| 1614 | ZORRO | 16.2 | Virginia R. Hansen | | | |
| 4407 | ZYDECO | 17.0 1/2 | Mill Creek Ponies | 6756 | | |
| Nbr | Name | Size | Owner | Owner# | Lessee | Lessee# |
| 1964 | ZACHARY TAYLOR | 16 | Ozz Enterprises | 3112 | | |
| 6161 | Zachary Wadsworth | 13.1 1/2 | Wadsworth Equestrian | 9439 | | |
| 8804 | Zahnya | 16.2 | Lisa Clements | 17146 | | |
| 6818 | Zaine | 17.2 | Andrea Stephens | 16117 | | |
| 2715 | ZAMIRO | 17.1 | Jay Shuttleworth | | | |
| 615 | Zamundo | 16.2 | Brad Federico | 2354 | | |
| 388 | Zantura | 16.2 | Erin Hosselbeck | | Adison Rice | 8031 |
| 3775 | ZAPPA | 15.1 | Anna Jane Woodard | | | |
| 6478 | Zarrageous | 15.2 | Deborah Kline | 9798 | | |
| 460 | Zarrageous | 15.2 | Mollie McWhorter | 17137 | Louis McWhorter | |
| 2345 | ZAVANA | 17.2 | Cynthia A. Wilberding | | | |
| 4038 | ZELLA | 15.1 | | 6437 | | |
| 4730 | ZEN | 16 | Meadow Hill Stables | 6207 | | |
| 629 | Zenzero | 15.3 | Lauren Hancock | 1891 | | |
| 1528 | ZEPHYR | 15.1 | Webb Farm | 2339 | | |
| 4224 | ZEPHYR | 16.3 | Jessica Brittenham | 6407 | | |
| 8977 | Zetterberg | 16.2 | Townsend Farm | 7715 | | |
| 2653 | ZEUS | 16.1 | Harmony Farm | 3067 | | |
| 418 | Zeus | 16.2 | Sophia Strahan | 17055 | Jean Strahan | |
| 6342 | Ziggy Stardust | 13.0 1/2 | Laurie Occhipinti | 9674 | Sydney Monckton | 9214 |
| 1248 | ZIGGY STARDUST | 15.3/4 | Linda B. Blackford | | | |
| 3529 | ZINFANDEL | 15.2 | Whitney Brooks | 5982 | | |
| 3296 | ZIP | 16.3 | Carver Camp Weaver | 3205 | | |
| 4455 | ZIPPED ABIT | 15.2 | Teresa Plemmons | | | |
| 394 | Zoolander | 14.1 3/4 | Madison Parker Spangle | | Ashleigh Colantuoni | 9028 |
| 1582 | ZOOM | 16.3 | | | | |
| 6212 | Zoot Alors | | Lee Heelan | 114 | | |
| 1614 | ZORRO | 16.2 | Virginia R. Hansen | | | |
| 4407 | ZYDECO | 17.0 1/2 | Mill Creek Ponies | 6756 | | |
