Golden Rock (, Ponmalai) is one of the four zones of Tiruchirappalli. The railway colony and railway workshop are nearby
The majority of the area is occupied by Golden Rock Railway Workshop and its residential colonies for its employees.
Its neighborhoods are Kalkandar Kottai, Keezhakkurichy, Nathamaadipatti, Ponmalaipatti, Kottapattu, Subramaniyapuram, Sangiliandapuram, Senthaneerpuram, Ambikapuram, Thangeswari Nagar, Ex-servicemen colony. Most of the civilians of golden rock are S.Rly employees. It is well known for its shandy (market) held every Sunday, which was established during British rule in 1926.
Nearest Railway Stations are (GOC), Manjatidal (MCJ) and (TPJ).
It has one of the city's oldest hospital belonging to Indian Railways, Divisional Railway Hospital.