A small town located south of Thanjavur, has population approximately 1000. Thiruvonam is a panchayat union comprises more than 20 small villages around and far. North East boundary of its panchayat union lies right in the suburb of Thanjavur called Mariamman Kovil. Currently, in the process of transforming itself into a separate Taluk. Mrs. Uma maheshwari being current chairman of panchayat union. Mr. M. Muthuveeran being the councilor of the union. History of this little town dates back to early 1000 A.D.. It was one of the important places of pilgrimage for Cholas dynasty. MuthuThangappa Football club and festival of temples of Muthumariamman are widely regarded.