The city has a population of 59,637 (2005) and covers the whole tambon Thap Thiang of Mueang Trang district.

At just 8°N, the temperature in Trang is sees little variation throughout the year, although the pre-monsoon months from February to April are a little hotter in the daytime.

The year is divided into a short dry season, from January to February, and a long wet season from March to December, with the heaviest rain in September.

The main road through Trang is Phetkasem Road (Route 4), which connects the city to Phatthalung and the border with Malaysia to the south-east, and to Krabi, Phang Nga, Phuket (via Route 402), Ranong, Chumphon, Prachuap Khiri Khan, Phetchaburi, Ratchaburi, and Bangkok to the north.

[6] Thai AirAsia, Nok Air and Thai Lion Air provide services to Bangkok from Trang.