Lok Sabha Speaker Meira Kumar said the "fearless girl" had become a "powerful symbol" of the ongoing battle to ensure justice for women and effect social change.
"In her untimely and sad demise, we have lost a courageous daughter of our country who faced life with tremendous strength and fortitude...She will continue to inspire us for all times to come," Kumar said.
"We must wake up and make India safe for daughters," she said on microblogging site Twitter.
Minister of State for HRD Shashi Tharoor said he was deeply saddened by the passing of "our brave sister in Singapore."
"She waged a courageous battle for life and galvanized a cause that will not die," Tharoor said.