Vanchangi is a village in Rajavommangi Mandal, Alluri Sitharama Raju district in the state of Andhra Pradesh in India.
Vanchangi is located at .
India census, Vanchangi had a population of 450, out of which 233 were male and 227 were female. The population of children below 6 years of age was 11%. The literacy rate of the village was 37%.