• Companies based in Orange County, California(17 C, 67 P)
• Emergency services in Orange County, California(1 C, 13 P)

A

• Organizations based in Anaheim, California(2 C, 3 P)

F

• Organizations based in Fullerton, California(1 C, 3 P)

G

• Organizations based in Garden Grove, California(3 P)

I

• Organizations based in Irvine, California(1 C, 11 P)

O

• Organizations based in Orange, California(1 C)

R

• Roman Catholic Diocese of Orange(21 P)

S

• Organizations based in Santa Ana, California(1 C, 9 P)
• Sports clubs and teams in Orange County, California(15 C, 13 P)

V

• Việt Nam Quốc Dân Đảng(5 P)

B

• Bahia Corinthian Yacht Club
• Balboa Bay Club
• Balboa Yacht Club

F

• Forming Kaos

I

• Institute for Healthcare Advancement

J

• John D. Cooper Archaeological and Paleontological Center

L

• Laguna Beach Chamber Music Society
• Lockman Foundation

M

• Music Saves Lives

N

• Newport Harbor Yacht Club

O

• OC Parks
• Orange County Cousins Club
• Orange County Employees Association
• Orange County Labor Federation

P

• Professional Association of Diving Instructors
• Public Enemy No. 1 (gang)

R

• Roman Catholic Diocese of Orange

S

• St. Michael's Abbey (Orange County, California)
• South Coast Air Quality Management District

T

• Toastmasters International
• Tustin Playbox

V

• Việt Nam Quốc Dân Đảng
• Voice of OC