This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. Find sources:  "National Higher Secondary School Mannargudi" –  news · newspapers · books · scholar · JSTOR (July 2018) ( Learn how and when to remove this message)

The National Higher Secondary School, Mannargudi (NHSS) is a school in Mannargudi, India. It was established in 1899 by Sri Singaravel Udaiyar and Sri Ramadurai Iyer. It uses English and Tamil as its languages of instruction.

The school conducts science exhibitions and participates in NSS activities. It features vocational studies as a course choice.

Social activities of the school in the media

• Centenary celebrations
• More Centenary celebrations
• NSS activities
• Schools towards residences of students
• Kit that could produce oxygen
• National Higher Secondary School stadium/ground