San Juan's 2026 population is now estimated at 565,946. In 1950, the population of San Juan was 108,151. San Juan has grown by 5,127 in the last year, which represents a 0.91% annual change. These population estimates and projections come from the latest revision of the UN World Urbanization Prospects. These estimates represent the Urban agglomeration of San Juan, which typically includes San Juan's population in addition to adjacent suburban areas.
| City | 2026 Pop. ↓ | Growth |
|---|---|---|
| Buenos Aires | 15,890,600 | 0.88% |
| Cordoba | 1,655,500 | 0.91% |
| Rosario | 1,648,320 | 1.06% |
| Mendoza | 1,271,120 | 1.11% |
| San Miguel de Tucuman | 1,062,270 | 1.07% |
| La Plata | 942,456 | 0.99% |
| Salta | 745,986 | 1.14% |
| Resistencia | 460,926 | 0.99% |
| Corrientes | 436,980 | 1.03% |
| Posadas | 424,853 | 1.16% |
| San Salvador de Jujuy | 387,488 | 1.04% |
| Bahia Blanca | 330,154 | 0.86% |
| La Rioja | 178,872 | 1.02% |
| Comodoro Rivadavia | 175,196 | 1.03% |
| San Fernando del Valle de Catamarca | 159,139 | 1.01% |
| Rio Cuarto | 157,010 | 1.01% |
| Concordia | 149,450 | 1% |
| San Nicolas de los Arroyos | 133,602 | 1.01% |
| San Rafael | 118,009 | 1.01% |
| Tandil | 116,916 | 1.02% |
| Villa Mercedes | 111,391 | 1.02% |
| San Carlos de Bariloche | 109,305 | 1.02% |
| Pergamino | 104,985 | 1.02% |
| Santa Rosa | 102,880 | 1% |
| Santa Rosa | 102,880 | 1% |
| Lujan | 97,363 | 1.04% |
| Rio Gallegos | 95,796 | 1.02% |
| Rafaela | 91,571 | 1.01% |
| Presidencia Roque Saenz Pena | 89,882 | 1.02% |
| Junin | 87,509 | 1.01% |
| Chimbas | 87,258 | 1.02% |
| Campana | 86,860 | 1.01% |
| Necochea | 84,784 | 1.03% |
| General Roca | 81,534 | 1.02% |
| Puerto Madryn | 81,315 | 1.04% |
| Gualeguaychu | 80,614 | 1.01% |
| San Martin | 79,476 | 1.05% |
| San Martin | 79,476 | 1.05% |
| Villa Maria | 79,351 | 1.01% |
| Cipolletti | 77,713 | 1.02% |
| San Ramon de la Nueva Oran | 76,070 | 1.01% |
| Venado Tuerto | 75,437 | 1.01% |
| Concepcion del Uruguay | 72,528 | 1.01% |
| Goya | 71,606 | 1.01% |
| Reconquista | 70,549 | 1.01% |
| Rio Grande | 66,425 | 1.03% |
| Santo Tome | 65,684 | 1.13% |
| Santo Tome | 65,684 | 1.13% |
| Obera | 63,960 | 1.02% |
| Tartagal | 63,196 | 1.01% |
| Villa Carlos Paz | 62,423 | 1% |
| San Francisco | 61,750 | 1.01% |
| Punta Alta | 58,315 | 1% |
| Chivilcoy | 58,152 | 1.01% |
| General Pico | 56,795 | 1.01% |
| Ushuaia | 56,593 | 1.03% |
| Mercedes | 56,116 | 1.01% |
| Mercedes | 56,116 | 1.01% |
| Azul | 55,728 | 1.01% |
| Barranqueras | 54,698 | 1.01% |
| Clorinda | 52,837 | 1.01% |
| Viedma | 52,789 | 1.01% |
| Palpala | 50,183 | 1.01% |