Barrios de Colorado O

• Oak Crest (1)
• Oak Hills (1)
• Oak Valley Ranch (4)
• Old Colorado City (25)
• Old Farm (6)
• Old North Boulder (4)
• Old Town Fort Collins (23)
• Olde Town Arvada (7)
• Outer Aurora (107)
• Outer Central (9)
• Outer Lakewood-West Corridor (19)
• Outer Stapleton-East Denver (19)
• Overland (15)