K. Thamboosamy Pillay (Tamil: தம்புசாமி பிள்ளை) was a prominent Malaysian of Tamil origin during the pre-independence years. He was considered the leader of the Tamil community. He was a wealthy businessman, tin miner, moneylender and government contractor.
Thamboosamy was one of the founders and one of the original Trustees of Victoria Institution as well as the founder of the Sri Mahamariamman Temple, Kuala Lumpur.
Born in Singapore in 1850, K. Thamboosamy Pillay received his early education at Raffles Institution. He sailed to Klang in 1875 with James Guthrie Davidson, when the latter was appointed Malaya's first British Resident. Prior to that, he had been a clerk in the legal firm in which Davidson was a partner.
He was later transferred to the Treasury where he eventually became chief clerk and acted as State Treasurer on a few occasions. He was sent to India by the Malayan Government to bring over the first batch of Indian immigrants for the Railway and Public Works. Thamboosamy resigned from Government service in the 1880s and, going into partnership with Loke Yew, managed the New Tin Mining Company in Rawang. They were the first to use electric pumps for mining in Malaya.
A Justice of Peace and member of the prestigious KL Sanitary Board, Thamboosamy was the acknowledged leader of the Tamil community. His other business interests included coffee planting, real estate and construction. He constructed part of the main road from Kuala Lumpur to Kuala Kubu. He was a member of both the Selangor Club and the Turf Club and owned several horses.
Thamboosamy died in 1902 in Singapore, where he had gone to attend a meeting at the Singapore Turf Club.
A Justice of Peace and member of the prestigious KL Sanitary Board, Thamboosamy was the acknowledged leader of the Indian community in Malaya, especially in Kuala Lumpur.