Alagappa may refer to:
Alagappa (given name), an Indian male given name Alagappa Chettiar (1909–1957), Indian businessman and philanthropist Alagappa Chettiar College of Engineering and Technology Alagappa College of Technology, a college in India Alagappa Polytechnic, a college in India Alagappa University Evening College, Rameswaram, a college in Rameswaram, Tamil Nadu, India Alagappa Nagar, a village in Kerala, India
See also Alagappan, an Indian surname