St. Mary's 2026 population is now estimated at 1,852. In 1991, the population of St. Mary was 1,449. St. Mary has grown by 7 in the last year, which represents a 0.38% annual change. These population values and projections come from Jersey parish populations via CityPopulation and World Population Review Internal Projections .
| City | 2026 Pop. ↓ | Growth |
|---|---|---|
| St. Helier | 37,030 | 0.66% |
| St. Saviour | 14,069 | 0.24% |
| St. Brelade | 11,241 | 0.41% |
| St. Clement | 10,297 | 0.74% |
| Grouville | 5,690 | 1.05% |
| St. Lawrence | 5,634 | 0.27% |
| St. Peter | 5,400 | 0.52% |
| St. Ouen | 4,262 | 0.28% |
| St. Martin | 4,044 | 0.47% |
| Trinity | 3,459 | 0.61% |
| St. John | 3,123 | 0.45% |
| St. Mary | 1,852 | 0.38% |
