#Mannkibaat sparked a great deal of commentary all over the year, including a tweet from cricket legend Sachin Tendulkar that went viral.
"Mann Ki Baat" is a radio programme hosted by Modi on the last Sunday of every month to addresses people of the nation on All India Radio, DD National and DD News.
"#MumbaiRains and #TripleTalaq emerged as some of the top trending hashtags of the year," Twitter said.
Jallikattu, a traditional Tamilian bull-taming sport, was in the spotlight earlier in 2017.
Other trending hashtags were #Demonetisation, #SwachhBharat, #UttarPradesh, #GujaratElections and #Aadhaar.