Tham Rong (Thai: ถ้ำรงค์, pronounced [tʰâm rʰōŋ]) is a tambon (subdistrict) of Ban Lat District, Phetchaburi Province, western Thailand.

The evidence inside proves this subdistrict has been existed for thousand years.

At that time, there were a total of 12 muban (village), later in 1979 there was a separation of Tam Rong from Tamru, with the Phetchaburi River as the boundary line.

[1] Most of the terrain is a floodplain with low mountains and waterway running through every village.

Therefore, it is suitable for agricultural activities, such as rice farming, fruit orchards, etc.