Sisak's 2026 population is now estimated at 36,770. In 2011, the population of Sisak was 47,768. Sisak experienced a decrease of -647 residents over the past year, marking an annual decline of -1.73%. These population values and projections come from Croatian Bureau of Statistics city census populations (2011 and 2021) and World Population Review Internal Projections .
| City | 2026 Pop. ↓ | Growth |
|---|---|---|
| Zagreb | 755,938 | -0.29% |
| Split | 152,472 | -1.03% |
| Rijeka | 98,914 | -1.74% |
| Osijek | 90,933 | -1.14% |
| Zadar | 68,730 | -0.59% |
| Velika Gorica | 59,889 | -0.39% |
| Pula - Pola | 49,782 | -0.95% |
| Karlovac | 46,488 | -1.2% |
| Slavonski Brod | 45,824 | -1.69% |
| Varazdin | 42,281 | -0.7% |
| Dubrovnik | 41,045 | -0.25% |
| Sibenik | 40,847 | -0.84% |
| Kastela | 37,365 | -0.23% |
| Samobor | 37,336 | -0.05% |
| Sisak | 36,770 | -1.73% |
| Bjelovar | 34,485 | -1.03% |
| Vinkovci | 28,824 | -1.35% |
| Koprivnica | 27,507 | -0.76% |
| Cakovec | 27,131 | 0.01% |
| Solin | 25,344 | 0.38% |
| Zapresic | 23,606 | -0.44% |
| Sinj | 22,794 | -0.57% |
| Djakovo | 21,734 | -1.62% |
| Vukovar | 21,204 | -1.77% |
| Pozega | 20,546 | -1.62% |
| Virovitica | 18,378 | -0.98% |
| Sveta Nedelja | 18,303 | 0.09% |
| Kutina | 18,190 | -1.48% |
| Krizevci | 17,948 | -1.08% |
| Petrinja | 17,940 | -2.1% |
| Dugo Selo | 17,782 | 0.12% |
| Porec - Parenzo | 16,563 | -0.05% |
| Metkovic | 14,513 | -0.97% |
| Sveti Ivan Zelina | 13,967 | -0.89% |
| Jastrebarsko | 13,951 | -0.85% |
| Omis | 13,757 | -0.54% |
| Nasice | 13,413 | -1.26% |
| Makarska | 13,042 | -0.4% |
| Rovinj - Rovigno | 12,352 | -0.97% |
| Umag - Umago | 12,332 | -0.58% |
| Ivanic - Grad | 12,263 | -1.14% |
| Ivanec | 12,235 | -0.78% |
| Vrbovec | 12,158 | -1.31% |
| Trogir | 12,012 | -0.62% |
| Ogulin | 11,488 | -1.27% |
| Novi Marof | 11,130 | -1.15% |
| Krapina | 11,083 | -0.79% |
| Gospic | 10,927 | -1.01% |
| Nova Gradiska | 10,596 | -1.94% |
| Slatina | 10,546 | -1.72% |
| Opatija | 10,134 | -0.93% |
| Novska | 10,109 | -1.92% |
| Knin | 10,108 | -2.77% |
| Kastav | 10,085 | -0.23% |
| Labin | 9,864 | -1.09% |
| Duga Resa | 9,760 | -0.9% |
| Crikvenica | 9,454 | -1.08% |
| Daruvar | 9,418 | -1.4% |
| Benkovac | 9,070 | -1.3% |
| Valpovo | 9,000 | -1.66% |
| Vodice | 8,538 | -0.26% |
| Zabok | 8,492 | -0.38% |
| Ludbreg | 8,477 | 0% |
| Imotski | 8,440 | -1.61% |
| Pleternica | 8,209 | -2.12% |
| Pazin | 8,105 | -0.43% |
| Belisce | 8,048 | -1.96% |
| Zupanja | 7,964 | -2.75% |
| Garesnica | 7,826 | -1.93% |
| Trilj | 7,755 | -1.06% |
| Otocac | 7,691 | -1.59% |
| Ploce | 7,403 | -2.08% |
| Donji Miholjac | 7,388 | -1.65% |
| Mali Losinj | 7,263 | -0.74% |
| Bakar | 7,243 | -0.89% |
| Krk | 7,100 | 0.81% |
| Beli Manastir | 7,095 | -2.31% |
| Djurdjevac | 6,971 | -1.13% |
| Rab | 6,748 | -1.17% |
| Prelog | 6,663 | -1.07% |
| Pakrac | 6,485 | -1.76% |
| Cazma | 6,419 | -1.52% |
| Lepoglava | 6,359 | -1.75% |
| Glina | 6,230 | -2.63% |
| Buzet | 5,933 | -0.22% |
| Drnis | 5,742 | -1.76% |
| Vodnjan - Dignano | 5,702 | -0.47% |
| Oroslavje | 5,688 | -0.51% |
| Mursko Sredisce | 5,641 | -0.74% |
| Pregrada | 5,619 | -1.07% |
| Biograd na Moru | 5,617 | 0.05% |
| Senj | 5,447 | -1.84% |
| Ozalj | 5,401 | -1.55% |
| Zlatar | 5,330 | -0.89% |
| Vrgorac | 5,306 | -1.41% |
| Korcula | 5,295 | -0.45% |
| Varazdinske Toplice | 5,165 | -1.37% |
| Donja Stubica | 5,157 | -0.65% |
| Grubisno Polje | 4,885 | -1.87% |
| Delnice | 4,770 | -1.47% |
| Lipik | 4,674 | -1.83% |
| Supetar | 4,456 | 0.59% |
| Ilok | 4,356 | -2.9% |
| Otok | 4,306 | -2.54% |
| Kutjevo | 4,300 | -2.45% |
| Orahovica | 4,196 | -1.55% |
| Buje - Buie | 4,111 | -1.53% |
| Novi Vinodolski | 3,982 | -1.65% |
| Slunj | 3,853 | -1.83% |
| Hvar | 3,850 | -0.65% |
| Kraljevica | 3,815 | -1.27% |
| Novalja | 3,689 | 0.05% |
| Novigrad - Cittanova | 3,679 | -1.1% |
| Vrbovsko | 3,387 | -2.67% |
| Skradin | 3,134 | -1.32% |
| Obrovac | 3,086 | -2.22% |
| Cabar | 2,984 | -1.55% |
| Pag | 2,885 | -1.9% |
| Stari Grad | 2,768 | 0% |
| Nin | 2,686 | -0.15% |
| Opuzen | 2,650 | -1.38% |
| Cres | 2,638 | -0.57% |
| Klanjec | 2,382 | -1.37% |
| Vis | 1,910 | -0.1% |
| Hrvatska Kostajnica | 1,552 | -3.72% |
| Vrlika | 1,540 | -2.28% |
| Komiza | 1,332 | -0.89% |
