South Africa's huge 280-run win over England in the final cricket Test in Centurion failed to stop their slide from the top of the rankings chart to the third spot.
India are the new leaders with 110 rating points followed by Australia and the Proteas.
Pakistan are fourth ahead of England (5th), New Zealand (6), Sri Lanka (7), West Indies (8), Bangladesh (9) and Zimbabwe (10.
"After England's 2-1 series win v SA. India are officially No. 1 in Test Rankings," the ICC wrote on its twitter handle.
India moved to the second of the Test rankings in December last year when they mauled South Africa 3-0 on home soil.
