Kan: ಮಂಡ್ಯ maṇḍya
‘Settlement’ City/District, Karnataka
Skt: mandira, ‘dwelling’, ‘resting place’, ‘house’, ’palace’, ‘camp‘, ‘temple’.
Like Mandvi (Gujarat) the most popular derivation is the unlikely one that the town was named after the ancient sage, Mandavya, who was impaled for a crime he did not commit. It is possible that the name is a corruption of the catch-all mandira above.
The modern city is, in fact, only 75 years old, although it has many important archaeological sites.
Mandya is called ‘Sugar City’: it has four factories producing 2.6m tonnes of sugar annually icluding the 90-tear old Mysugar factory run by the Mysore Sugar Company.

Mysore Sugar Company, Mandya The Hindu