Tham Chalong (Thai: ถ้ำฉลอง, pronounced [tʰâm t͡ɕʰā.lɔ̌ːŋ]) is a tambon (sub-district) of Mueang Uttaradit District, in Uttaradit Province, Thailand.
[1] The sub-district was created effective 1 August 1984 by splitting off three administrative villages from Hat Ngio.
[2] The tambon is divided into four administrative villages (muban).
The area of the sub-district is covered by the sub-district administrative organization (SAO) Tham Chalong (องค์การบริหารส่วนตำบลถ้ำฉลอง).
This Uttaradit province location article is a stub.