St. Pierre du Bois ( St. Peter )'s 2026 population is now estimated at 1,960. In 1981, the population of St. Pierre du Bois ( St. Peter ) was 2,018. St. Pierre du Bois ( St. Peter ) experienced a decrease of -14 residents over the past year, marking an annual decline of -0.71%. These population values and projections come from Guernsey parishes and islands populations via CityPopulation and World Population Review Internal Projections .