Kalaiya's 2026 population is now estimated at 143,023. In 2011, the population of Kalaiya was 123,575. Kalaiya has grown by 1,387 in the last year, which represents a 0.98% annual change. These population values and projections come from Nepal city census series 2001-2021 via CityPopulation official attribution and World Population Review Internal Projections .
| City | 2026 Pop. ↓ | Growth |
|---|---|---|
| Kathmandu | 799,560 | -1.5% |
| Pokhara | 571,940 | 2.18% |
| Bharatpur | 420,206 | 2.62% |
| Lalitpur | 294,725 | 0.04% |
| Birgunj | 287,737 | 1.1% |
| Biratnagar | 257,714 | 1.11% |
| Itahari | 231,013 | 3.21% |
| Dhangadhi | 228,990 | 2.87% |
| Butwal | 227,936 | 3.24% |
| Ghorahi | 225,465 | 2.37% |
| Budhanilkantha | 223,282 | 4.69% |
| Hetauda | 216,565 | 2.27% |
| Janakpur | 212,659 | 1.8% |
| Tulsipur | 201,629 | 2.32% |
| Tarakeshwar | 194,503 | 5.13% |
| Birendranagar | 186,159 | 3.88% |
| Tilottama | 182,356 | 4.06% |
| Dharan | 180,700 | 1.65% |
| Suryabinayak | 179,873 | 5.13% |
| Nepalganj | 177,438 | 1.53% |
| Gokarneshwar | 173,696 | 3.06% |
| Chandragiri | 171,111 | 4.57% |
| Kageshwari Manohara | 167,479 | 5.13% |
| Mahalaxmi | 158,084 | 5.13% |
| Tokha | 154,091 | 2.87% |
| Nagarjun | 148,224 | 5.13% |
| Sundarharaicha | 146,792 | 4.08% |
| Mechinagar | 144,411 | 1.65% |
| Kalaiya | 143,023 | 0.98% |
| Madhyapur Thimi | 142,869 | 3.59% |
| Birtamod | 137,814 | 3.47% |
| Jitpur Simara | 132,010 | 0.73% |
| Bhimdatta | 130,988 | 1.38% |
| Damak | 127,580 | 3.54% |
| Kohalpur | 120,187 | 3.4% |
| Triyuga | 110,382 | 1.45% |
| Godawari | 107,605 | 1.96% |
| Lahan | 107,426 | 1.04% |
| Siraha | 102,344 | 1.41% |
| Kawasoti | 102,261 | 3.33% |
| Ratnanagar | 101,725 | 2.5% |
| Tikapur | 97,072 | 1.56% |
| Kirtipur | 89,902 | 1.96% |
| Inaruwa | 80,580 | 1.47% |
| Siddharthanagar | 79,923 | 1.43% |
| Gulariya | 77,893 | 0.89% |
| Bhaktapur | 76,968 | -0.55% |
| Banepa | 73,302 | 1.61% |
| Rajbiraj | 71,775 | 0.27% |
