| POPULATION OF INDIA OVER A CENTURY | ||
| Year | Population | Decadal Growth
Rate (Percent) |
| 1901 | 238396327 | |
| 1911 | 252093390 | +5.75 |
| 1921 | 251321213 | -0.03 |
| 1931 | 278977238 | +11.00 |
| 1941 | 318660580 | +14.22 |
| 1951 | 361088090 | +13.31 |
| 1961 | 439234771 | +21.51 |
| 1971 | 548159652 | +24.80 |
| 1981 | 683329097 | +24.66 |
| 1991 | 846302688 | +23.85 |
| 2001 | 1027015247 | +21.34 |
Notes:
1. In 1981, census was not conducted in Assam. Based on the 1971 census and the final results of the 1991 census, the population of Assam as on March 1, 1981 has been interpolated.2. The 1991 census was not conducted in Jammu and Kashmir. The above figure for 1991 include the projected population for Jammu and Kashmir.
3. In Arunachal Pradesh, the census was conducted for the first time in 1961. Population of Arunachal Pradesh is not considered for calculation of decadal growth up to 1961.
4. Figures for 2001 are provisional.(Census of India 2001).