Iasi's 2025 population is now estimated at 316,343. In 1950, the population of Iasi was 94,156. Iasi experienced a decrease of -193 residents over the past year, marking an annual decline of -0.06%. These population estimates and projections come from the latest revision of the UN World Urbanization Prospects . These estimates represent the Urban agglomeration of Iasi, which typically includes Iasi's population in addition to adjacent suburban areas.
| City | 2025 Pop. ↓ | Growth |
|---|---|---|
| Bucharest | 1,758,700 | |
| Sector 3 | 385,439 | |
| Sector 6 | 367,760 | |
| Sector 2 | 345,370 | |
| Constanta | 310,471 | |
| Cluj-Napoca | 308,304 | |
| Timisoara | 306,435 | |
| Craiova | 302,601 | |
| Galati | 298,861 | |
| Sector 4 | 287,828 | |
| Brasov | 284,596 | |
| Sector 5 | 271,575 | |
| Ploiesti | 232,527 | |
| Sector 1 | 225,453 | |
| Braila | 216,292 | |
| Oradea | 206,614 | |
| Bacau | 175,500 | |
| Arad | 172,824 | |
| Pitesti | 168,458 | |
| Sibiu | 154,892 | |
| Targu-Mures | 146,863 | |
| Baia Mare | 137,976 | |
| Buzau | 133,116 | |
| Satu Mare | 115,630 | |
| Botosani | 115,344 | |
| Ramnicu Valcea | 107,656 | |
| Suceava | 106,138 | |
| Piatra Neamt | 105,499 | |
| Drobeta-Turnu Severin | 104,035 | |
| Focsani | 103,219 | |
| Targu Jiu | 96,562 | |
| Tulcea | 92,762 | |
| Targoviste | 89,429 | |
| Resita | 83,985 | |
| Bistrita | 81,467 | |
| Slatina | 79,171 | |
| Slatina | 79,171 | |
| Hunedoara | 71,380 | |
| Vaslui | 70,267 | |
| Calarasi | 70,039 | |
| Calarasi | 70,039 | |
| Giurgiu | 69,587 | |
| Roman | 69,483 | |
| Deva | 69,390 | |
| Barlad | 69,183 | |
| Alba Iulia | 66,369 | |
| Zalau | 63,305 | |
| Sfantu Gheorghe | 61,512 | |
| Turda | 55,770 | |
| Medias | 55,203 | |
| Slobozia | 52,677 | |
| Slobozia | 52,677 | |
| Alexandria | 50,591 | |
| Petrosani | 45,447 | |
| Lugoj | 44,571 | |
| Medgidia | 43,867 | |
| Pascani | 42,172 | |
| Tecuci | 42,012 | |
| Miercurea-Ciuc | 41,282 | |
| Sighetu Marmatiei | 41,246 | |
| Mangalia | 40,037 | |
| Ramnicu Sarat | 38,805 | |
| Campina | 38,758 | |
| Dej | 38,478 | |
| Odorheiu Secuiesc | 36,926 | |
| Fagaras | 36,121 | |
| Mioveni | 35,849 | |
| Reghin-Sat | 35,490 | |
| Caracal | 34,603 | |
| Falticeni | 33,867 | |
| Husi | 33,320 | |
| Fetesti | 33,197 | |
| Vulcan | 33,186 | |
| Vulcan | 33,186 | |
| Curtea de Arges | 32,626 | |
| Navodari | 32,400 | |
| Sighisoara | 32,287 | |
| Radauti | 32,151 | |
| Rosiorii de Vede | 31,873 | |
| Oltenita | 31,434 | |
| Lupeni | 31,409 | |
| Caransebes | 31,199 | |
| Dorohoi | 31,073 | |
| Cugir | 30,244 | |
| Turnu Magurele | 30,187 | |
| Voluntari | 30,016 | |
| Sacele | 29,967 | |
| Campia Turzii | 29,852 | |
| Tarnaveni | 29,828 | |
| Sebes | 29,475 | |
| Aiud | 28,909 | |
| Petrila | 28,742 | |
| Borsa | 27,247 | |
| Zarnesti | 26,520 | |
| Zarnesti | 26,520 | |
| Comanesti | 26,237 | |
| Motru | 25,860 | |
| Carei | 25,590 | |
| Moinesti | 25,532 | |
| Codlea | 24,814 | |
| Orastie | 24,354 | |
| Gherla | 24,232 | |
| Fetesti-Gara | 23,789 | |
| Bals | 23,147 | |
| Moreni | 22,868 | |
| Targu Neamt | 22,634 | |
| Dragasani | 22,499 | |
| Targu Secuiesc | 22,251 | |
| Bailesti | 22,231 | |
| Corabia | 21,932 | |
| Campulung Moldovenesc | 21,862 | |
| Blaj | 21,819 | |
| Gheorgheni | 21,245 | |
| Calafat | 21,227 | |
| Adjud | 20,776 | |
| Cernavoda | 20,514 | |
| Baicoi | 20,234 | |
| Filiasi | 20,159 | |
| Salonta | 20,006 | |
| Buftea | 19,617 | |
| Buhusi | 18,395 | |
| Breaza | 17,949 | |
| Ludus | 17,165 | |
| Viseu de Sus | 16,938 | |
| Urziceni | 16,770 | |
| Baia Sprie | 16,746 | |
| Bocsa | 16,349 | |
| Vatra Dornei | 16,054 | |
| Pantelimon | 16,019 | |
| Brad | 15,988 | |
| Gura Humorului | 15,728 | |
| Simleu Silvaniei | 15,721 | |
| Mizil | 15,532 | |
| Ocna Mures | 15,316 | |
| Rasnov | 15,253 | |
| Zimnicea | 15,228 | |
| Popesti-Leordeni | 15,115 | |
| Cisnadie | 15,042 | |
| Gaesti | 15,037 | |
| Pucioasa | 14,971 | |
| Darmanesti | 14,290 | |
| Vicovu de Sus | 14,077 | |
| Avrig | 14,032 | |
| Marghita | 13,871 | |
| Simeria | 13,827 | |
| Targu Frumos | 13,797 | |
| Dabuleni | 13,641 | |
| Negresti-Oas | 13,456 | |
| Valenii de Munte | 13,276 | |
| Moldova Noua | 13,263 | |
| Ovidiu | 13,257 | |
| Comarnic | 13,254 | |
| Targu Ocna | 13,127 | |
| Sannicolau Mare | 12,888 | |
| Stefanesti | 12,837 | |
| Pecica | 12,804 | |
| Chitila | 12,788 | |
| Calan | 12,782 | |
| Santana | 12,706 | |
| Poiana Mare | 12,633 | |
| Scornicesti | 12,456 | |
| Orsova | 12,350 | |
| Oravita | 12,332 | |
| Rovinari | 12,259 | |
| Tandarei | 12,231 | |
| Draganesti-Olt | 12,056 | |
| Jilava | 12,023 | |
| Sinaia | 11,918 | |
| Darabani | 11,890 | |
| Tomesti | 11,828 | |
| Videle | 11,813 | |
| Storesti | 11,806 | |
| Urlati | 11,798 | |
| Holboca | 11,708 | |
| Bolintin Vale | 11,700 | |
| Matca | 11,642 | |
| Strehaia | 11,607 | |
| Otelu Rosu | 11,482 | |
| Sovata | 11,465 | |
| Boldesti-Scaeni | 11,460 | |
| Nehoiu | 11,350 | |
| Belcesti | 11,335 | |
| Harlau | 11,295 | |
| Pechea | 11,287 | |
| Ianca | 11,209 | |
| Jibou | 11,183 | |
| Lipova | 11,041 | |
| Topoloveni | 11,039 | |
| Dolhasca | 11,025 | |
| Covasna | 10,979 | |
| Liesti | 10,956 | |
| Beclean | 10,909 | |
| Murfatlar | 10,906 | |
| Breaza de Sus | 10,903 | |
| Hateg | 10,865 | |
| Jimbolia | 10,860 | |
| Dofteana | 10,785 | |
| Beius | 10,721 | |
| Costesti | 10,654 | |
| Agnita | 10,505 | |
| Deleni | 10,484 | |
| Vladimirescu | 10,451 | |
| Bumbesti-Jiu | 10,445 | |
| Calinesti | 10,419 | |
| Seini | 10,382 | |
| Nasaud | 10,380 | |
| Valea Calugareasca | 10,378 | |
| Otopeni | 10,332 | |
| Macin | 10,295 | |
| Bucov | 10,279 | |
| Alesd | 10,264 | |
| Cormaia | 10,254 | |
| Victoria | 10,247 | |
| Valea lui Mihai | 10,240 | |
| Sabaoani | 10,218 | |
| Filipestii de Padure | 10,169 | |
| Nicolae Balcescu | 10,140 | |
| Ciurea | 10,110 | |
| Babadag | 10,101 | |
| Titu | 10,081 | |
| Harsova | 10,055 | |
| Ineu | 10,051 | |
| Negresti | 10,043 | |
| Sascut | 10,031 |
