| Charleston Tree Services | Graham Andrew Charleston | — | (707) 497 4471 | Tree | Mc Kinleyville · Humboldt County | — | — |
| Coastal Tree Service | Thomas William Head | — | (707) 683 6042 | Tree | Mc Kinleyville · Humboldt County | — | — |
| Custom Stump Grinders | Custom Stump Grinders | customstumpgrinders@gmail.com | (707) 668 5682 | Tree | Eureka · Humboldt County | — | — |
| Cutting Edge Tree Service And Solutions | Erik Warren Tjossem | — | (707) 601 8169 | Tree | Eureka · Humboldt County | — | — |
| Lost Coast Tree And Habitat | Lost Coast Tree And Habitat | — | (707) 496 9607 | Tree | Whitethorn · Humboldt County | — | — |
| R Brown Construction Company INC | Roger Dale Sr Brown | — | (530) 629 3702 | Tree | Willow Creek · Humboldt County | — | — |
| Red Coast Tree Service | Eri J Marroquin | — | (714) 380 2971 | Tree | Fortuna · Humboldt County | — | — |
| Rfi Tree Services | Timothy Alan Metz | — | (707) 496 0322 | Tree | Arcata · Humboldt County | — | — |
| Squatchies Trees LLC | Benjamin Russel Blackburn | — | (415) 912 7479 | Tree | Arcata · Humboldt County | — | — |
| Summers Tree Service | John William Summers | — | (315) 317 2024 | Tree | Eureka · Humboldt County | — | — |
| Tree Tactics | Tree Tactics | — | (707) 616 2929 | Tree | Fortuna · Humboldt County | — | — |
| Tree Ventures Inc. | Tree Ventures Inc. | office@treeventuresca.net | (707) 407-4077 | Tree | Humboldt · Humboldt County | — | — |
| Western Star Tree Company INC | Eugene Duane Abbott | — | (707) 223 5800 | Tree | Whitethorn · Humboldt County | — | — |