▁of ▁only ▁ 4 9 0 , 4 7 2 ▁in ▁ 1 5 ▁years . ▁The ▁first ▁qu in qu enn ial ▁enumer ation ▁of ▁the ▁population ▁was ▁made ▁in ▁ 1 8 5 1 - 5 2 . ▁It ▁returned ▁a ▁population ▁of ▁ 2 2 , 0 3 1 , 6 9 7 . ▁Sub sequ ent ▁enumer ations ▁were ▁made ▁in ▁ 1 8 5 6 - 5 7 , ▁ 1 8 6 1 – 6 2 ▁and ▁ 1 8 6 6 - 6 7 . ▁The ▁population ▁of ▁Mad ras ▁Pres iden cy ▁was ▁found ▁to ▁be ▁ 2 2 , 8 5 7 , 8 5 5 ▁in ▁ 1 8 5 1 - 5 2 , ▁ 2 4 , 6 5 6 , 5 0 9 ▁in ▁ 1 8 6 1 - 6 2 ▁and ▁ 2 6 , 5 3 9 , 0 5 2 ▁in ▁ 1 8 6 6 - 6 7 . ▁ ▁The ▁first ▁organized ▁census ▁of ▁India ▁was ▁conducted ▁in ▁ 1 8 7 1 . ▁It ▁returned ▁a ▁population ▁of ▁ 3 1 , 2 2 0 , 9 7 3 ▁for ▁Mad ras ▁Pres iden cy . ▁Since ▁then , ▁a ▁census ▁has ▁been ▁conducted ▁once ▁every ▁ten ▁years . ▁The ▁last ▁census ▁of ▁British ▁India ▁held ▁in ▁ 1 9 4 1 ▁returned ▁a ▁population ▁of ▁ 4 9 , 3 4 1 , 8 1 0 ▁for ▁Mad ras ▁Pres iden cy