India Religious Demography since 1951

1951 census

Hindu          84.10% Muslim          9.80% Christian        2.0%

1961 census

Hindu          83.45% Muslim       10.69% Christian       2.44%

1971 census

Hindu          82.73% Muslim       11.21% Christian       2.60%

1981 census

Hindu          82.30% Muslim       11.75% Christian       2.44%

1991 census

Hindu          81.53% Muslim       12.61% Christian       2.32%

2001 census

Hindu          80.46% Muslim       13.43% Christian       2.34%

2011 census

Hindu          78.35% Muslim       14.20% Christian       2.34%

GOI did not conduct 2021 census

Hindu population declined from 84.10% in 1951 to 78.35% in 2011.

Muslim population grew from 9.80% in 1951 to 14.20% in 2011.

As per experts, Christian population is way more than reported in census. SCs and STs converted to Christianity hide it to avail reservation benefits. This also means that Hindu population is less than the reported figure. 

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