Division No. 6, Subd. A is an unorganized subdivision in north-central Newfoundland, Newfoundland and Labrador, Canada. It is in Division No. 6. It surrounds the towns of Buchans and Millertown.
According to the 2001 Statistics Canada Census:
| Northwest: Division No. 5, Subd. A | Northeast: Division No. 6, Subd. C | |
| Division No. 6 Subd. A completely surrounds Buchans and Millertown | ||
| West: Division No. 4, Subd. C | South: Division No. 3, Subd. D |