When were first midterm election were held in India?

1951.

In 1947, India attained her independence. The Constitution of India came into force on January 26, 1950. The first general elections under the new Constitution were held during the year 1951-52 and the first elected Parliament came into being in April, 1952, the Second General elections in April, 1957, the Third General elections in April, 1962, the Fourth General elections in March, 1967, the Fifth General elections in March, 1971, the Sixth General elections in March, 1977, the Seventh General elections in January, 1980, the Eighth General elections in December, 1984, the Ninth General elections in December, 1989, the Tenth General elections in June, 1991, the Eleventh General elections in May, 1996, the Twelfth General elections in March, 1998 and Thirteenth General elections in October, 1999. and the Fourteenth General elections in May 2004.......