Alftanes's 2026 population is now estimated at 2,458. In 2000, the population of Alftanes was 1,388. Alftanes experienced a decrease of -14 residents over the past year, marking an annual decline of -0.57%. These population values and projections come from Statistics Iceland PX table MAN030102 localities population series and World Population Review Internal Projections .
| City | 2026 Pop. ↓ | Growth |
|---|---|---|
| Reykjavik | 249,228 | 1.96% |
| Keflavik og Njardvik | 23,732 | 4.22% |
| Akureyri | 20,483 | 1.59% |
| Selfoss | 10,597 | 3.61% |
| Akranes | 8,530 | 2.25% |
| Vestmannaeyjar | 4,537 | 1.05% |
| Grindavik | 3,658 | 1.16% |
| Hveragerdi | 3,622 | 5.14% |
| Isafjordur | 2,707 | 0.52% |
| Egilsstadir | 2,686 | 1.21% |
| Saudarkrokur | 2,612 | 0.08% |
| Husavik | 2,497 | 0.97% |
| Alftanes | 2,458 | -0.57% |
| Thorlakshofn | 2,235 | 4.73% |
| Borgarnes | 2,204 | 1.33% |
| Sandgerdi | 2,077 | 2.16% |
| Gardur | 1,965 | 2.77% |
| Hofn i Hornafirdi | 1,795 | 0.79% |
| Vogar | 1,499 | 3.95% |
| Neskaupstadur | 1,466 | 0.21% |
| Reydarfjordur | 1,379 | 0.36% |
| Dalvik | 1,360 | 0% |
| Siglufjordur | 1,168 | 0.17% |
| Stykkisholmur | 1,167 | -0.09% |
| Eskifjordur | 1,126 | 1.72% |
| Hvolsvollur | 1,109 | 1.37% |
| Hella | 1,096 | 3.89% |
| Bolungarvik | 1,007 | 1.82% |
| Olafsvik | 955 | -0.31% |
| Blonduos | 825 | -0.6% |
| Patreksfjordur | 795 | 2.58% |
| Faskrudsfjordur | 765 | 2% |
| Grundarfjordur | 763 | -0.91% |
| Olafsfjordur | 747 | -1.06% |
| Vik i Myrdal | 706 | 5.06% |
| Seydisfjordur | 656 | 0.61% |
| Eyrarbakki | 638 | 2.74% |
| Hvammstangi | 611 | 0.33% |
| Stokkseyri | 553 | 1.65% |
| Grundarhverfi | 532 | 0.19% |
| Fludir | 531 | 3.11% |
| Vopnafjordur | 507 | -0.2% |
| Skagastrond | 443 | -0.45% |
