This chart show the population of Kinshasa, Tehran, and St. Petersburg from 1950 to 2020.
| Year | Kinshasa | Tehran | St. Petersburg |
| 1950 | 202000 | 1041000 | 2903000 |
| 1951 | 217000 | 1104000 | 2949000 |
| 1952 | 234000 | 1171000 | 2996000 |
| 1953 | 252000 | 1242000 | 3043000 |
| 1954 | 272000 | 1317000 | 3092000 |
| 1955 | 292000 | 1396000 | 3141000 |
| 1956 | 315000 | 1481000 | 3191000 |
| 1957 | 339000 | 1570000 | 3241000 |
| 1958 | 365000 | 1665000 | 3293000 |
| 1959 | 402000 | 1766000 | 3345000 |
| 1960 | 443000 | 1873000 | 3398000 |
| 1961 | 488000 | 1986000 | 3452000 |
| 1962 | 537000 | 2106000 | 3507000 |
| 1963 | 591000 | 2233000 | 3563000 |
| 1964 | 651000 | 2368000 | 3620000 |
| 1965 | 717000 | 2511000 | 3677000 |
| 1966 | 790000 | 2663000 | 3735000 |
| 1967 | 869000 | 2812000 | 3795000 |
| 1968 | 939000 | 2963000 | 3855000 |
| 1969 | 1002000 | 3122000 | 3916000 |
| 1970 | 1070000 | 3290000 | 3980000 |
| 1971 | 1142000 | 3466000 | 4047000 |
| 1972 | 1219000 | 3653000 | 4115000 |
| 1973 | 1301000 | 3849000 | 4184000 |
| 1974 | 1388000 | 4055000 | 4254000 |
| 1975 | 1482000 | 4273000 | 4325000 |
| 1976 | 1582000 | 4503000 | 4398000 |
| 1977 | 1688000 | 4671000 | 4472000 |
| 1978 | 1802000 | 4803000 | 4547000 |
| 1979 | 1923000 | 4939000 | 4606000 |
| 1980 | 2053000 | 5079000 | 4645000 |
| 1981 | 2191000 | 5223000 | 4684000 |
| 1982 | 2338000 | 5370000 | 4724000 |
| 1983 | 2496000 | 5522000 | 4764000 |
| 1984 | 2664000 | 5679000 | 4804000 |
| 1985 | 2812000 | 5839000 | 4844000 |
| 1986 | 2968000 | 6004000 | 4885000 |
| 1987 | 3133000 | 6107000 | 4927000 |
| 1988 | 3307000 | 6192000 | 4968000 |
| 1989 | 3490000 | 6278000 | 4990000 |
| 1990 | 3683000 | 6365000 | 4989000 |
| 1991 | 3888000 | 6453000 | 4987000 |
| 1992 | 4104000 | 6517000 | 4960000 |
| 1993 | 4331000 | 6573000 | 4908000 |
| 1994 | 4571000 | 6630000 | 4866000 |
| 1995 | 4825000 | 6687000 | 4836000 |
| 1996 | 5093000 | 6744000 | 4811000 |
| 1997 | 5375000 | 6831000 | 4793000 |
| 1998 | 5641000 | 6929000 | 4771000 |
| 1999 | 5885000 | 7028000 | 4745000 |
| 2000 | 6140000 | 7128000 | 4719000 |
| 2001 | 6406000 | 7230000 | 4694000 |
| 2002 | 6683000 | 7333000 | 4668000 |
| 2003 | 6972000 | 7438000 | 4681000 |
| 2004 | 7274000 | 7544000 | 4708000 |
| 2005 | 7589000 | 7652000 | 4734000 |
| 2006 | 7918000 | 7762000 | 4762000 |
| 2007 | 8261000 | 7845000 | 4789000 |
| 2008 | 8619000 | 7915000 | 4816000 |
| 2009 | 8992000 | 7987000 | 4844000 |
| 2010 | 9382000 | 8059000 | 4872000 |
| 2011 | 9788000 | 8131000 | 4924000 |
| 2012 | 10212000 | 8227000 | 4987000 |
| 2013 | 10655000 | 8335000 | 5051000 |
| 2014 | 11116000 | 8444000 | 5116000 |
| 2015 | 11598000 | 8555000 | 5181000 |
| 2016 | 12100000 | 8667000 | 5248000 |
| 2017 | 12624000 | 8781000 | 5315000 |
| 2018 | 13171000 | 8896000 | 5383000 |
| 2019 | 13743000 | 9014000 | 5427000 |
| 2020 | 14342000 | 9135000 | 5468000 |
