Montegiardino's 2026 population is now estimated at 987. In 1986, the population of Montegiardino was 577. 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% |