'Ko Lamphu' (เกาะลำพู) is a small island in the Tapi River, Thailand. This island is located about 9 km from the river mouth, near the town center of Surat Thani. It is connected by bridge to the city at the Pillar Shrine.
Ko Lamphu is 0.75 km in length and it is flat. This island is car-free, which contributes to the peaceful atmosphere and makes it a popular place for picnic as well as for sports. Ko Lamphu has a promenade by the riverfront with food stalls that is particularly pleasant in the evening.
Ko Lamphu should not be confused with Ko Lamphu Rai, another riverine island located in Trat Province.
The Chak Phra and the Thot Phapa Buddhist ceremonies are celebrated on the same day at Ko Lamphu. At the Thot Phapa event Buddha images on elaborately decorated carriages are pulled by local people during land and water-borne processions. This ceremony takes place at dawn. Chak Phra, celebrated later on, consists in the offering of saffron robes to monks and donations to temples at the end of the Buddhist Rains Retreat.