According to Television Audience Measurement - a joint-venture between Nielsen Media Research and Kantar Media Research - the channel's share of the Hindi-speaking market jumped by 130 per cent overall.
Key states such as Uttar Pradesh and Maharashtra saw its share grow by between 62 and 190 per cent.
Until the end of March this year, content on Star News India was split 60:40 between Hindi and English, with New Delhi TV (NDTV) contracted to help with the production of its various programmes.
The repositioning, which saw NDTV being dropped as a production partner ending a five-year relationship, was aimed at strengthening its content and at the same time reach out to a broader audience by switching to an all-Hindi format.
Star has invested heavily in the move, including in the setting up of a new team of anchors and reporters and 21 news bureaus across India.
Star News India president, Ravina Raj Kohli, characterised the repositioning as a "turning point" for the channel.
"Our first week's ratings are a clear vindication of our strategy. Changing to Hindi, the language of the people, and to the news that is relevant to Indians has proven effective for us."
The repositioning followed research across India which revealed that people weren't getting the news they wanted, Kohli said.