| A & M Tree Specialist | Vanesa Acevedo | — | (877) 778 7337 | Tree | Anaheim · Orange County | — | — |
| A & S Tree Service | Rosas Reyes Antonio De | — | (714) 718 4381 | Tree | Orange · Orange County | — | — |
| A's Tree Service | Segura Areli | — | (714) 296 2598 | Tree | Placentia · Orange County | — | — |
| AC & Son Tree Service | Jesus Cortes | — | (714) 999 7047 | Tree | Anaheim · Orange County | — | — |
| Aliso Viejo Tree Service | Aliso Viejo Tree Service | — | (949) 649-7346 | Tree | Aliso Viejo · Orange County | — | — |
| Arnulfo Munoz | Arnulfo Munoz | — | (562) 533 0661 | Tree | La Habra · Orange County | — | — |
| Art Of Arborists | Art Of Arborists | — | (949) 494 1024 | Tree | Laguna Niguel · Orange County | — | — |
| Betterment Tree Health Care LLC | Hernan Jesualdo Gonzalez | — | (714) 905 6444 | Tree | Huntington Beach · Orange County | — | — |
| Bro Tree Service INC | Reyes German Garcia | — | (714) 880 2065 | Tree | Anaheim · Orange County | — | — |
| C A & A Tree Care INC | Yakelin Coreas Vigil | — | (714) 595 3363 | Tree | Garden Grove · Orange County | — | — |
| C&a Tree Care Services INC | Adalberto Ramirez Cruz | — | (714) 994 9663 | Tree | Buena Park · Orange County | — | — |
| Cabral Tree Service | Cabral Camilo | — | (714) 748 1605 | Tree | Garden Grove · Orange County | — | — |
| California Tree & Landscape | California Tree & Landscape | — | (559) 478-4133 | Tree | Fresno · Orange County | — | — |
| Century Products | Century Products | — | (714) 632 7083 | Tree | Anaheim · Orange County | — | — |
| Cliff Russell's Tree Service | Clifford George Russell | — | (949) 240 8126 | Tree | San Juan Capistrano · Orange County | — | — |
| Coast Arbor | Coast Arbor | — | (562) 682 8537 | Tree | La Habra · Orange County | — | — |
| Coastal Arbor Tree Service INC | Simon Glen Timms | coastalarbor@yahoo.com | (949) 392 3100 | Tree | San Juan Capistrano · Orange County | — | — |
| D&r Tree Service INC | Vidals Ricardo Cortes | — | (714) 209 9426 | Tree | Anaheim · Orange County | — | — |
| David's Tree Service INC | David Paul Diaz | — | (714) 842 6345 | Tree | Huntington Beach · Orange County | — | — |
| Del's Tree Experts INC | Monse Azyadet Salazar | — | (714) 767 1885 | Tree | Anaheim · Orange County | — | — |
| Diamond Arborist Service | Benjamin Hannaniah Kent | — | (949) 689 6836 | Tree | Laguna Hills · Orange County | — | — |
| Earthwise Arborists INC | Dana Jay Hunter | — | (714) 577 8733 | Tree | Placentia · Orange County | — | — |
| Eller's Tree Service | Lee Nicholas Eller | — | (949) 646 8747 | Tree | Santa Ana · Orange County | — | — |
| Environmental Green Tree Care/ Killelea Landscape | Environmental Green Tree Care/ Killelea Landscape | — | (949) 690-6410 | Tree | Anaheim · Orange County | — | — |
| Ernie Ureno Tree Service INC | Eliseo Morales | — | (714) 491 7132 | Tree | Santa Ana · Orange County | — | — |
| Favor Tree Care | Favor Tree Care | — | (714) 395 9495 | Tree | Anaheim · Orange County | — | — |
| Figueroa Tree Service Corp | Rosemary Figueroa | — | (714) 603 8574 | Tree | Westminster · Orange County | — | — |
| Fnl Tree Services INC | Niz Lopez Francisco | — | (949) 903 8202 | Tree | Costa Mesa · Orange County | — | — |
| Forever Green S&g Tree Service | Moreno Gabriela Villascan | — | (714) 836 1865 | Tree | Villa Park · Orange County | — | — |
| Francisco Vivar Tree Service | Francisco Pavia Vivar | — | (949) 454 9079 | Tree | Aliso Viejo · Orange County | — | — |
| Freddy's Tree Service | Freddy's Tree Service | — | (714) 630-1578 | Tree | Anaheim · Orange County | — | — |
| G N Z Tree Experts | Miguel Angel Gonzalez-Medel | — | (714) 353 5098 | Tree | Orange · Orange County | — | — |
| Garden Grove Tree Service | Garden Grove Tree Service | — | (714) 942-5436 | Tree | Garden Grove · Orange County | — | — |
| George Salinas Tree Preservation | George Salinas Tree Preservation | — | (916) 342 8730 | Tree | Placentia · Orange County | — | — |
| Gold Standard Tree Care | Carlos Alberto Ceja | — | (657) 615 3879 | Tree | Tustin · Orange County | — | — |
| Golden Tree Care | Golden Tree Care | — | (714) 574-4227 | Tree | Santa Ana · Orange County | — | — |
| Green Planet Services | Diaz Alfredo Ortiz | — | (714) 800 9885 | Tree | La Habra · Orange County | — | — |
| Gus Tree Service | Castro Rangel Gustavo | — | (714) 990 4902 | Tree | Yorba Linda · Orange County | — | — |
| J A Y Tree Service | Jose Luis Anaya | — | (714) 336 3744 | Tree | Santa Ana · Orange County | — | — |
| J Rodriguez Tree Care Maintenance INC | Junior Juvenal Rosales | — | (562) 547 2379 | Tree | La Habra · Orange County | — | — |