Division No. 1, Subd. O is an unorganized subdivision on the Avalon Peninsula in Newfoundland and Labrador, Canada, in Division No. 1. It's divided into two parts, the northern portion touches Conception Bay.
According to the 2001 Statistics Canada Census:
| North: Colliers, Conception Harbour, Avondale, Harbour Main-Chapel's Cove-Lakeview | ||
| West: Division No. 1, Subd. N, Division No. 1, Subd. M |
Division No. 1, Subd. O |
East: Holyrood |
| South: Division No. 1, Subd. W |