Fontvielle's 2026 population is now estimated at 2,681. In 1975, the population of Fontvielle was 11,744. Fontvielle experienced a decrease of -137 residents over the past year, marking an annual decline of -4.86%. These population values and projections come from IMSEE 2008 census report district historical series (direct), Monaco district census series 1975-2016 via CityPopulation official attribution and World Population Review Internal Projections .