Mellat Park literally the Nation Park, is an urban park in northern Tehran, Iran. It is one of the city's largest green spaces situated adjacent to Valiasr Street at the foot of the Alborz mountains to the east, extending to Chamran Expressway and Seoul Street to the west. It is watered by winter-snow streams coming down from Mount Tochal.
The park lies in the southern grounds of Tehran International Fair and the Enghelab Club. It is home to one of the first musical fountains in Tehran and includes facilities such as playgrounds, snack bars, cafes, and a small aviary. There is also a cineplex at the southeastern edge of the park.