Ha Nam is located on south of Red River Delta, southern gateway of Hanoi. It shares border with Hung Yen, Ha Tay provinces on the north, Hoa Binh Province on the west, Nam Dinh and Ninh Binh provinces on the south and south-east.
There are two main rivers: Day and Chau Giang rivers. Most of the land in this area is divided by the dense rivers. Therefore, it has the water area of ponds, lagoons, low fields and rivers which are convenient for aquaculture and water poultry rising.
Ha Nam has tropical climate: rainy season lasts from October to May and dry season lasts from November to April next year. The annual average temperature is 23ºC.