Isabela City's 2026 population is now estimated at 154,495. In 2000, the population of Isabela City was 73,032. Isabela City has grown by 4,357 in the last year, which represents a 2.9% annual change. These population values and projections come from Philippines city proper population 2000-2015 via PSA OpenSTAT export, Philippines city proper population 2020 via PSA OpenSTAT export and World Population Review Internal Projections .
| City | 2026 Pop. ↓ | Growth |
|---|---|---|
| Quezon City | 2,967,838 | 0.1% |
| Davao | 1,952,063 | 1.64% |
| Manila | 1,909,418 | 0.64% |
| Caloocan City | 1,814,693 | 1.24% |
| Taguig City | 1,312,651 | 4.55% |
| Zamboanga | 1,116,376 | 2.38% |
| Cebu | 1,003,705 | 0.77% |
| Cagayan de Oro | 871,916 | 2.34% |
| Pasig | 860,541 | 1.19% |
| Valenzuela | 842,975 | 2.83% |
| General Santos | 740,092 | 2.01% |
| Paranaque | 711,736 | 0.61% |
| Makati | 677,655 | 1.38% |
| Bacolod | 643,516 | 1.24% |
| Las Pinas | 623,282 | 0.52% |
| Lapu-Lapu | 570,519 | 3.09% |
| Muntinlupa | 537,195 | 0.57% |
| Angeles | 528,531 | 2.3% |
| Iloilo | 464,198 | 0.32% |
| Pasay City | 462,914 | 0.96% |
| Mandaluyong | 462,756 | 1.66% |
| Marikina | 455,639 | 0.1% |
| Butuan | 416,042 | 1.93% |
| Malabon | 396,892 | 0.75% |
| Iligan | 387,139 | 1.12% |
| Baguio | 385,706 | 1.01% |
| Puerto Princesa | 371,416 | 3.47% |
| Cotabato | 370,580 | 1.96% |
| Mandaue | 359,137 | -0.09% |
| Lucena | 293,594 | 0.89% |
| Olongapo | 293,096 | 2.11% |
| Tacloban | 258,499 | 0.6% |
| Navotas | 243,518 | -0.22% |
| Isabela City | 154,495 | 2.9% |
| San Juan | 127,790 | 0.41% |