Suja Karthika is an Indian actress and dancer who has appeared in over 20 Malayalam films.

Karthika's debut film was the 2002 Rajasenan film Malayali Mamanu Vanakkam. Her well known roles include in films such as Paadam Onnu: Oru Vilapam (2003), Runway (2004), Nerariyan CBI (2005), Achanurangatha Veedu (2006), and Nadiya Kollappetta Rathri (2007). She has appeared in some television serials as well. She is a gold medalist in MBA from MG University. After that she entered as a teacher at SCMS, Aluva and currently teaches at Marian Academy of Management Studies, Puthuppaady, Kothamangalam. Her father Sundareshan serves as the director in the same college.