Jamestown's 2026 population is now estimated at 3,942. In 2025, the population of Jamestown was 4,037. Jamestown experienced a decrease of -95 residents over the past year, marking an annual decline of -2.35%. These population values and projections come from World Population Review Internal Projections .
| City | 2026 Pop. ↓ | Growth |
|---|---|---|
| St. Helena | 3,942 | -2.35% |
| Jamestown | 3,942 | -2.35% |
| Ascension | 769 | -4.94% |
| Tristan da Cunha | 270 | 0.75% |