Bucheon's 2020 population is now estimated at 832,093. In 1950, the population of Bucheon was 30,895. Bucheon has grown by -12,321 since 2015, which represents a -0.29% annual change. These population estimates and projections come from the latest revision of the UN World Urbanization Prospects. These estimates represent the Urban agglomeration of Bucheon, which typically includes Bucheon's population in addition to adjacent suburban areas.
| Year | Population | Growth Rate (%) | Growth |
|---|---|---|---|
| 2035 | 847,274 | 0.24% | 10,023 |
| 2030 | 837,251 | 0.23% | 9,648 |
| 2025 | 827,603 | -0.11% | -4,490 |
| 2020 | 832,093 | -0.29% | -12,321 |
| 2015 | 844,414 | -0.17% | -7,323 |
| 2010 | 851,737 | 0.55% | 23,211 |
| 2005 | 828,526 | 1.89% | 73,930 |
| 2000 | 754,596 | 1.27% | 46,200 |
| 1995 | 708,396 | 1.71% | 57,559 |
| 1990 | 650,837 | 8.41% | 216,265 |
| 1985 | 434,572 | 15.52% | 223,367 |
| 1980 | 211,205 | 14.41% | 103,477 |
| 1975 | 107,728 | 5.12% | 23,813 |
| 1970 | 83,915 | 5.12% | 18,549 |
| 1965 | 65,366 | 5.12% | 14,446 |
| 1960 | 50,920 | 5.12% | 11,258 |
| 1955 | 39,662 | 5.12% | 8,767 |
| 1950 | 30,895 | 0.00% |