Sudha Bhattacharya (born 7 March 1952) is an Indian academic, scientist and a writer. She is recognized primarily for her in-depth study of Entamoeba histolytica, a parasitic protozoan that causes amoebiasis: Dr. Bhattacharya's laboratory first detected Ribosomal RNA genes on Circular DNA, while studying the parasite, and also discovered families of retrotransposons in the parasite genome. Her work has primarily been in the fields of Molecular Parasitology and Gene Regulation.