St. Mary Cayon's 2026 population is now estimated at 3,453. In 1980, the population of St. Mary Cayon was 3,308. St. Mary Cayon has grown by 1 in the last year, which represents a 0.03% annual change. These population values and projections come from Saint Kitts and Nevis parish census series via CityPopulation and World Population Review Internal Projections .
| City | 2026 Pop. ↓ | Growth |
|---|---|---|
| St. George Basseterre | 11,764 | -0.47% |
| Basseterre | 11,764 | -0.47% |
| St. Peter Basseterre | 7,072 | 2.81% |
| St. John Figtree | 5,798 | 2.8% |
| Christ Church Nichola Town | 3,776 | 2.44% |
| St. Mary Cayon | 3,453 | 0.03% |
| St. Thomas Middle Island | 2,760 | 0.55% |
| St. John Capisterre | 2,580 | -0.92% |
| St. James Windward | 2,443 | 1.24% |
| St. Paul Capisterre | 2,401 | -0.08% |
| St. George Gingerland | 2,397 | -0.29% |
| St. Thomas Lowland | 2,102 | 0.1% |
| St. Paul Charlestown | 1,936 | 0.31% |
| Trinity Palmetto Point | 1,736 | 0.12% |
| St. Anne Sandy Point | 909 | -4.82% |