Karaj's 2025 population is now estimated at 1,614,660. In 1950, the population of Karaj was 7,159. Karaj has grown by 11,650 in the last year, which represents a 0.73% 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 Karaj, which typically includes Karaj's population in addition to adjacent suburban areas.
| City | 2025 Pop. ↓ | Growth |
|---|---|---|
| Tehran | 9,729,740 | |
| Mashhad | 3,460,660 | |
| Shiraz | 1,763,900 | |
| Tabriz | 1,695,670 | |
| Isfahan | 1,547,164 | |
| Qom | 1,392,280 | |
| Ahvaz | 1,324,800 | |
| Kermanshah | 1,117,360 | |
| Orumiyeh | 860,169 | |
| Pasragad Branch | 787,878 | |
| Kahriz | 766,706 | |
| Rasht | 757,765 | |
| Bandar Abbas | 690,978 | |
| Zahedan | 643,702 | |
| Ardabil | 614,154 | |
| Hamadan | 611,801 | |
| Yazd | 609,302 | |
| Arak | 589,740 | |
| Kerman | 559,142 | |
| Azadshahr | 514,102 | |
| Zanjan | 509,683 | |
| Sanandaj | 482,664 | |
| Qazvin | 444,984 | |
| Khorramabad | 420,998 | |
| Gorgan | 391,519 | |
| Abadan | 370,180 | |
| Sari | 338,115 | |
| Khorramshahr | 330,606 | |
| Khomeyni Shahr | 277,334 | |
| Borujerd | 251,958 | |
| Qarchak | 251,834 | |
| Sabzevar | 226,183 | |
| Najafabad | 223,450 | |
| Neyshabur | 220,929 | |
| Nazarabad | 213,388 | |
| Bukan | 213,331 | |
| Sirjan | 207,645 | |
| Babol | 202,796 | |
| Amol | 199,382 | |
| Birjand | 196,982 | |
| Bojnurd | 192,041 | |
| Varamin | 179,603 | |
| Malayer | 176,573 | |
| Saveh | 175,533 | |
| Khowy | 175,370 | |
| Bushehr | 165,377 | |
| Mahabad | 162,434 | |
| Saqqez | 151,237 | |
| Rafsanjan | 147,680 | |
| Ilam | 140,940 | |
| Miandoab | 132,819 | |
| Shahrud | 131,889 | |
| Gonbad-e Kavus | 131,416 | |
| Iranshahr | 131,232 | |
| Shahr-e Kord | 129,153 | |
| Torbat-e Heydariyeh | 125,633 | |
| Semnan | 124,826 | |
| Marand | 124,191 | |
| Zabol | 121,989 | |
| Quchan | 111,752 | |
| Masjed Soleyman | 111,510 | |
| Bandar-e Anzali | 110,826 | |
| Baneh | 104,799 | |
| Parsabad | 101,661 | |
| Kuhdasht | 100,208 | |
| Bam | 99,268 | |
| Akbarabad | 98,342 | |
| Fasa | 98,061 | |
| Yasuj | 96,786 | |
| Kashmar | 96,151 | |
| Dogonbadan | 94,638 | |
| Kazerun | 94,511 | |
| Ahar | 94,348 | |
| Behshahr | 93,500 | |
| Marivan | 91,664 | |
| Aligudarz | 91,041 | |
| Alvand | 90,000 | |
| Qorveh | 87,953 | |
| Borazjan | 86,059 | |
| Shirvan | 82,790 | |
| Salmas | 81,606 | |
| Bonab | 80,359 | |
| Shahre Jadide Andisheh | 80,000 | |
| Behbahan | 79,327 | |
| Shushtar | 77,507 | |
| Khomeyn | 77,425 | |
| Nahavand | 76,250 | |
| Alvand | 74,889 | |
| Nurabad | 73,528 | |
| Naqadeh | 73,528 | |
| Takestan | 71,499 | |
| Minab | 70,790 | |
| Abhar | 69,889 | |
| Dehdasht | 69,726 | |
| Chalus | 69,638 | |
| Khash | 69,603 | |
| Langarud | 68,148 | |
| Damghan | 67,694 | |
| Firuzabad | 66,558 | |
| Nurabad | 64,041 | |
| Darab | 63,319 | |
| Robat Karim | 62,753 | |
| Piranshahr | 61,973 | |
| Kamyaran | 61,642 | |
| Esfarayen | 59,678 | |
| Asadabad | 59,617 | |
| Zarand | 58,983 | |
| Torbat-e Jam | 58,928 | |
| Shahriar | 58,849 | |
| Ardakan | 58,834 | |
| Harsin | 57,647 | |
| Abadeh | 56,988 | |
| Malard | 56,745 | |
| Abyek | 55,128 | |
| Bijar | 53,871 | |
| Pishva | 53,856 | |
| Kangavar | 53,414 | |
| Bandar-e Genaveh | 52,750 | |
| Borujen | 52,654 | |
| Shahr-e Babak | 52,409 | |
| Shush | 52,284 | |
| Meybod | 51,874 | |
| Sarpol-e Zahab | 51,611 | |
| Takab | 51,541 | |
| Khalkhal | 51,024 | |
| Oshnaviyeh | 50,661 | |
| Khorramdarreh | 50,528 | |
| Tabas | 49,993 | |
| Falavarjan | 49,843 | |
| Istgah-e Rah Ahan-e Garmsar | 49,491 | |
| Rehnan | 49,143 | |
| Neka | 48,847 | |
| Babolsar | 48,051 | |
| Azadshahr | 47,590 | |
| Rudsar | 47,502 | |
| Azna | 47,482 | |
| Chabahar | 47,287 | |
| Omidiyeh | 46,983 | |
| Chenaran | 46,940 | |
| Sarakhs | 46,499 | |
| Dehloran | 46,002 | |
| Neyriz | 45,506 | |
| Hashtpar | 45,305 | |
| Golpayegan | 44,916 | |
| Gonabad | 43,465 | |
| Sonqor | 43,174 | |
| Astaneh-ye Ashrafiyeh | 42,784 | |
| Susangerd | 41,443 | |
| Shahin Dezh | 41,442 | |
| Ravar | 40,167 | |
| Qa'en | 40,157 | |
| Nowshahr | 40,000 | |
| Astara | 39,065 | |
| Ramhormoz | 38,821 | |
| Javanrud | 38,657 | |
| Qasr-e Qand | 37,722 | |
| Taybad | 37,513 | |
| Tonekabon | 37,501 | |
| Dorcheh Piaz | 37,462 | |
| Shadegan | 37,220 | |
| Bardsir | 37,192 | |
| Mahriz | 36,720 | |
| Eqbaliyeh | 36,709 | |
| Mohr | 35,000 | |
| Fereydunkenar | 34,097 | |
| Kalaleh | 33,700 | |
| Kelishad va Sudarjan | 33,630 | |
| Dowlatabad | 33,607 | |
| Delijan | 33,508 | |
| Farrokh Shahr | 32,391 | |
| Qarah Zia' od Din | 31,947 | |
| Bafq | 31,215 | |
| Pasargad | 29,825 | |
| `Ajab Shir | 29,675 | |
| Qahderijan | 29,392 | |
| Damavand | 29,144 | |
| Bahar | 28,645 | |
| Juybar | 28,404 | |
| Bardaskan | 28,233 | |
| Fuman | 27,763 | |
| Aleshtar | 27,701 | |
| Semirom | 27,220 | |
| Gerash | 25,316 | |
| Farsan | 25,071 | |
| Qeshm | 25,000 | |
| Darreh Shahr | 24,961 | |
| Bandar-e Lengeh | 22,768 | |
| Aghajari | 21,785 | |
| Khvansar | 21,146 | |
| Mahdishahr | 21,000 | |
| Kish | 20,922 | |
| Abrisham | 20,000 | |
| Ramshir | 19,454 | |
| Taft | 19,394 | |
| Abdanan | 19,360 | |
| Paveh | 17,779 | |
| Padegan-e Manjil | 17,396 | |
| Nikshahr | 17,000 | |
| Hashtrud | 16,888 | |
| Ardestan | 16,058 | |
| Tafresh | 14,399 | |
| Fannuj | 13,000 | |
| Mehran | 11,831 | |
| Fareydunshahr | 11,562 |
