Citta di San Marino's 2026 population is now estimated at 4,180. In 1986, the population of Citta di San Marino was 4,179. Citta di San Marino has grown by 22 in the last year, which represents a 0.53% annual change. These population values and projections come from San Marino castelli estimate series via CityPopulation and World Population Review Internal Projections .
| City | 2026 Pop. ↓ | Growth |
|---|---|---|
| Serravalle | 11,305 | 0.36% |
| Borgo Maggiore | 7,015 | 0.13% |
| Citta di San Marino | 4,180 | 0.53% |
| San Marino | 4,180 | 0.53% |
| Domagnano | 3,627 | 0.39% |
| Fiorentino | 2,594 | 0.23% |
| Acquaviva | 2,152 | 0.23% |
| Faetano | 1,221 | 0.41% |
| Chiesanuova | 1,201 | 0.76% |
| Montegiardino | 987 | 0% |