Oulainen's 2026 population is now estimated at 6,775. In 1972, the population of Oulainen was 7,230. Oulainen experienced a decrease of -68 residents over the past year, marking an annual decline of -0.99%. These population values and projections come from Statistics Finland 11re municipality population 31 Dec and World Population Review Internal Projections .
| City | 2026 Pop. ↓ | Growth |
|---|---|---|
| Helsinki | 696,374 | 0.9% |
| Espoo | 334,953 | 2.16% |
| Tampere | 269,746 | 1.82% |
| Vantaa | 258,585 | 1.45% |
| Oulu | 220,742 | 1.06% |
| Turku | 211,512 | 1.31% |
| Jyvaskyla | 152,051 | 0.95% |
| Kuopio | 128,299 | 1.04% |
| Lahti | 121,905 | 0.23% |
| Pori | 83,012 | -0.18% |
| Joensuu | 79,502 | 0.48% |
| Kouvola | 76,915 | -0.94% |
| Lappeenranta | 73,584 | 0.18% |
| Vaasa | 71,434 | 0.76% |
| Hameenlinna | 68,749 | 0.23% |
| Seinajoki | 67,839 | 0.92% |
| Rovaniemi | 66,841 | 0.85% |
| Porvoo | 52,254 | 0.5% |
| Mikkeli | 51,420 | -0.45% |
| Salo | 50,494 | -0.37% |
| Kotka | 49,447 | -0.76% |
| Kokkola | 48,661 | 0.3% |
| Jarvenpaa | 48,208 | 1.42% |
| Hyvinkaa | 47,244 | 0.23% |
| Nurmijarvi | 45,872 | 0.91% |
| Lohja | 45,557 | -0.14% |
| Tuusula | 43,840 | 1.89% |
| Kirkkonummi | 42,448 | 0.97% |
| Kerava | 39,186 | 0.94% |
| Rauma | 38,848 | -0.15% |
| Kaarina | 37,658 | 1.5% |
| Nokia | 37,084 | 1.25% |
| Kajaani | 36,334 | -0.14% |
| Kangasala | 34,819 | 1.27% |
| Ylojarvi | 33,894 | 0.28% |
| Savonlinna | 30,880 | -0.93% |
| Vihti | 28,620 | -0.31% |
| Riihimaki | 28,552 | -0.16% |
| Raseborg | 26,831 | -0.38% |
| Raisio | 26,415 | 1.3% |
| Lempaala | 25,431 | 1.15% |
| Imatra | 24,025 | -1.42% |
| Sipoo | 23,495 | 1.46% |
| Raahe | 23,162 | -0.87% |
| Sastamala | 23,132 | -0.71% |
| Hollola | 22,621 | -0.5% |
| Pirkkala | 21,653 | 1.44% |
| Siilinjarvi | 21,228 | -0.1% |
| Mantsala | 21,030 | 0.23% |
| Lieto | 20,960 | 0.71% |
| Valkeakoski | 20,800 | -0.11% |
| Tornio | 20,698 | -0.62% |
| Naantali | 20,486 | 0.88% |
| Kempele | 20,186 | 1.34% |
| Iisalmi | 20,119 | -0.84% |
| Korsholm | 19,883 | 0.37% |
| Jakobstad | 19,761 | 0.47% |
| Varkaus | 19,344 | -0.83% |
| Kurikka | 19,057 | -1.17% |
| Hamina | 19,023 | -0.75% |
| Laukaa | 18,860 | -0.05% |
| Kemi | 18,844 | -1.45% |
| Jamsa | 18,683 | -1.14% |
| Heinola | 17,495 | -0.94% |
| Aanekoski | 17,348 | -1.11% |
| Pieksamaki | 16,972 | -0.6% |
| Akaa | 16,365 | -0.07% |
| Forssa | 16,297 | -0.55% |
| Janakkala | 15,881 | -0.42% |
| Orimattila | 15,512 | -0.44% |
| Ylivieska | 15,457 | 0.17% |
| Kontiolahti | 15,199 | 0.42% |
| Loimaa | 15,062 | -0.76% |
| Kauhava | 14,794 | -0.85% |
| Kuusamo | 14,770 | -0.36% |
| Pargas | 14,770 | -0.33% |
| Uusikaupunki | 14,525 | -0.98% |
| Loviisa | 14,182 | -0.6% |
| Lapua | 13,918 | -0.39% |
| Ilmajoki | 12,484 | 0.22% |
| Kankaanpaa | 12,290 | -0.75% |
| Kauhajoki | 12,262 | -1.03% |
| Kalajoki | 12,233 | -0.16% |
| Ulvila | 12,208 | -0.71% |
| Mariehamn | 11,939 | 0.3% |
| Liperi | 11,859 | -0.23% |
| Paimio | 11,390 | 0.75% |
| Pedersore | 11,279 | 0.24% |
| Eura | 10,875 | -0.95% |
| Muurame | 10,800 | 0.87% |
| Alavus | 10,521 | -1.21% |
| Kauniainen | 10,397 | 0.7% |
| Hameenkyro | 10,323 | -0.13% |
| Nivala | 10,298 | -0.39% |
| Liminka | 10,195 | 0.02% |
| Sotkamo | 10,138 | -0.23% |
| Ii | 9,778 | -0.14% |
| Lieksa | 9,735 | -1.58% |
| Masku | 9,623 | 0.16% |
| Narpes | 9,588 | 0.18% |
| Huittinen | 9,365 | -1% |
| Kitee | 9,361 | -1.08% |
| Hattula | 9,338 | -0.12% |
| Mantta-Vilppula | 9,032 | -1.29% |
| Keuruu | 8,936 | -1.05% |
| Eurajoki | 8,897 | -0.86% |
| Alajarvi | 8,887 | -1.06% |
| Leppavirta | 8,774 | -1.1% |
| Orivesi | 8,757 | -0.64% |
| Nurmes | 8,753 | -1.27% |
| Muhos | 8,690 | -0.33% |
| Saarijarvi | 8,666 | -1.08% |
| Lapinlahti | 8,625 | -1.36% |
| Laitila | 8,438 | -0.25% |
| Karkkila | 8,338 | -0.61% |
| Somero | 8,303 | -0.75% |
| Sodankyla | 8,051 | -0.47% |
| Poytya | 7,917 | -0.59% |
| Asikkala | 7,818 | -0.45% |
| Hausjarvi | 7,766 | -0.86% |
| Loppi | 7,579 | -0.51% |
| Hanko | 7,505 | -1.29% |
| Laihia | 7,499 | -1.03% |
| Nykarleby | 7,432 | -0.04% |
| Keminmaa | 7,419 | -1.22% |
| Mynamaki | 7,402 | -0.51% |
| Inari | 7,367 | 0.99% |
| Kuhmo | 7,210 | -1.84% |
| Kiuruvesi | 7,111 | -1.66% |
| Pudasjarvi | 7,096 | -1.43% |
| Kittila | 7,028 | 1.38% |
| Mantyharju | 6,896 | -1.15% |
| Kemijarvi | 6,833 | -0.87% |
| Suomussalmi | 6,779 | -1.85% |
| Oulainen | 6,775 | -0.99% |
| Ikaalinen | 6,700 | -0.43% |
| Harjavalta | 6,539 | -0.82% |
| Kokemaki | 6,506 | -1.23% |
| Suonenjoki | 6,470 | -1.24% |
| Rusko | 6,461 | 0.33% |
| Tyrnava | 6,448 | -0.4% |
| Outokumpu | 6,349 | -0.73% |
| Kronoby | 6,307 | -0.28% |
| Haapajarvi | 6,291 | -1.55% |
| Iitti | 6,282 | -0.93% |
| Kimitoon | 6,268 | -0.81% |
| Haapavesi | 6,224 | -1.11% |
| Siuntio | 6,195 | 0.1% |
| Palkane | 6,165 | -0.58% |
| Vora | 6,119 | -0.73% |
| Larsmo | 6,088 | 1.72% |
| Sakyla | 6,077 | -1.44% |
| Virrat | 6,050 | -1.14% |
| Jomala | 6,022 | 2% |
| Kristinestad | 5,980 | -1.16% |
| Parkano | 5,937 | -1.08% |
| Tammela | 5,747 | -0.73% |
| Viitasaari | 5,610 | -1.34% |
| Juva | 5,515 | -1.41% |
| Inga | 5,418 | 0.15% |
| Malax | 5,398 | -0.17% |
| Kannus | 5,176 | -0.84% |
| Ahtari | 5,075 | -1.4% |
| Pyhtaa | 4,952 | -0.48% |
| Kangasniemi | 4,945 | -1.16% |
| Pornainen | 4,921 | -0.4% |
| Siikalatva | 4,807 | -1.33% |
| Nakkila | 4,781 | -1.61% |
| Jokioinen | 4,743 | -1.08% |
| Siikajoki | 4,672 | -1.37% |
| Nousiainen | 4,641 | -0.19% |
| Ruokolahti | 4,630 | -1.09% |
| Vesilahti | 4,578 | 0.75% |
| Taipalsaari | 4,572 | -0.26% |
| Askola | 4,537 | -1.24% |
| Pyhajarvi | 4,535 | -1.8% |
| Teuva | 4,508 | -1.66% |
| Sievi | 4,497 | -1.16% |
| Joroinen | 4,471 | -0.89% |
| Urjala | 4,421 | -0.81% |
| Hankasalmi | 4,368 | -1.58% |
| Luumaki | 4,255 | -1.18% |
| Isokyro | 4,240 | -0.91% |
| Ilomantsi | 4,193 | -2.17% |
| Parikkala | 4,131 | -1.99% |
| Kaustinen | 4,063 | -0.66% |
| Kolari | 4,044 | 0.72% |
| Juuka | 3,994 | -2.01% |
| Joutsa | 3,982 | -1.44% |
| Karkola | 3,981 | -1.36% |
| Aura | 3,974 | 0.1% |
| Ruovesi | 3,955 | -1.05% |
| Polvijarvi | 3,905 | -1.19% |
| Tohmajarvi | 3,830 | -1.85% |
| Pielavesi | 3,824 | -1.97% |
| Ylitornio | 3,644 | -1.03% |
| Uurainen | 3,642 | -0.22% |
| Pihtipudas | 3,565 | -1.74% |
| Taivalkoski | 3,537 | -1.64% |
| Ranua | 3,490 | -1.13% |
| Petajavesi | 3,444 | -1.52% |
| Sonkajarvi | 3,444 | -1.77% |
| Karstula | 3,430 | -2.03% |
| Sysma | 3,339 | -1.3% |
| Vierema | 3,264 | -1.33% |
| Kuortane | 3,246 | -1.34% |
| Salla | 3,238 | -0.71% |
| Rantasalmi | 3,183 | -0.96% |
| Pello | 3,131 | -0.95% |
| Savitaipale | 3,116 | -1.14% |
| Sauvo | 2,972 | 0.1% |
| Pyhajoki | 2,933 | -0.71% |
| Rautjarvi | 2,930 | -1.31% |
| Paltamo | 2,878 | -1.88% |
| Rautalampi | 2,860 | -1.28% |
| Veteli | 2,856 | -1.28% |
| Merikarvia | 2,838 | -1.15% |
| Heinavesi | 2,808 | -2.09% |
| Lemi | 2,797 | -0.92% |
| Posio | 2,762 | -2.06% |
| Tervola | 2,761 | -1.15% |
| Virolahti | 2,728 | -1.84% |
| Toholampi | 2,715 | -1.52% |
| Simo | 2,700 | -1.42% |
| Lappajarvi | 2,669 | -1.62% |
| Finstrom | 2,622 | 0.08% |
| Padasjoki | 2,591 | -1.6% |
| Perho | 2,526 | -1.33% |
| Punkalaidun | 2,523 | -1.64% |
| Vimpeli | 2,522 | -1.64% |
| Vaala | 2,497 | -1.65% |
| Reisjarvi | 2,491 | -1.27% |
| Kaavi | 2,475 | -2.25% |
| Hartola | 2,402 | -1.6% |
| Utajarvi | 2,386 | -1.65% |
| Konnevesi | 2,372 | -1.41% |
| Alavieska | 2,364 | -0.96% |
| Lapinjarvi | 2,350 | -1.63% |
| Toivakka | 2,334 | -0.3% |
| Muonio | 2,317 | 0.09% |
| Sulkava | 2,303 | -1.24% |
| Karsamaki | 2,299 | -1.58% |
| Puolanka | 2,270 | -1.6% |
| Tuusniemi | 2,245 | -1.45% |
| Vehmaa | 2,222 | -0.54% |
| Evijarvi | 2,208 | -1.43% |
| Lemland | 2,160 | 0.61% |
| Koski Tl | 2,136 | -1.16% |
| Ypaja | 2,132 | -1.39% |
| Karvia | 2,104 | -1.54% |
| Puumala | 2,081 | -0.48% |
| Humppila | 2,061 | -0.77% |
| Hirvensalmi | 2,020 | -0.93% |
| Lumijoki | 2,002 | -0.15% |
| Kuhmoinen | 1,979 | -1.44% |
| Korsnas | 1,951 | -0.86% |
| Hyrynsalmi | 1,908 | -2.35% |
| Keitele | 1,905 | -2.01% |
| Pyharanta | 1,884 | -0.89% |
| Marttila | 1,870 | -1.06% |
| Pomarkku | 1,867 | -1.69% |
| Vesanto | 1,792 | -1.59% |
| Raakkyla | 1,787 | -2.51% |
| Saltvik | 1,755 | -0.62% |
| Enontekio | 1,736 | -0.74% |
| Isojoki | 1,732 | -1.76% |
| Taivassalo | 1,716 | 0.7% |
| Soini | 1,711 | -2.51% |
| Pukkila | 1,700 | -1.28% |
| Pyhanta | 1,669 | 0.85% |
| Hammarland | 1,660 | 0.73% |
| Kihnio | 1,646 | -1.67% |
| Miehikkala | 1,641 | -1.85% |
| Jamijarvi | 1,631 | -0.85% |
| Juupajoki | 1,605 | -1.89% |
| Myrskyla | 1,596 | -2.44% |
| Kinnula | 1,444 | -1.63% |
| Rautavaara | 1,340 | -2.62% |
| Tervo | 1,336 | -1.91% |
| Multia | 1,327 | -2.43% |
| Oripaa | 1,293 | -0.39% |
| Enonkoski | 1,259 | -1.1% |
| Kaskinen | 1,226 | -0.57% |
| Siikainen | 1,200 | -2.6% |
| Karijoki | 1,133 | -1.13% |
| Kannonkoski | 1,127 | -2.51% |
| Ristijarvi | 1,120 | -1.84% |
| Utsjoki | 1,104 | -1.43% |
| Kyyjarvi | 1,094 | -2.67% |
| Merijarvi | 1,046 | -0.66% |
| Sund | 992 | -0.4% |
| Kivijarvi | 975 | -1.81% |
| Kustavi | 973 | 0.21% |
| Eckero | 955 | 0% |
| Savukoski | 946 | -0.94% |
| Halsua | 933 | -2.61% |
| Hailuoto | 918 | -0.54% |
| Pelkosenniemi | 900 | -0.55% |
| Luhanka | 717 | 0.42% |
| Lestijarvi | 643 | -1.68% |
| Geta | 519 | 0.39% |
| Foglo | 491 | -1.21% |
| Vardo | 464 | 0.65% |
| Brando | 424 | -0.7% |
| Lumparland | 370 | -0.27% |
| Kumlinge | 259 | -2.63% |
| Kokar | 226 | 0% |
| Sottunga | 108 | 3.85% |
