Ganjam (ଗଞ୍ଜାମ) is a coastal district in southern Odisha, lying along the Bay of Bengal between Chilika Lake in the north and the Andhra Pradesh border in the south. It is the most populous district of Odisha, with 3,529,031 people at the 2011 Census, and its administrative headquarters is Chhatrapur. Its largest city, Brahmapur (Berhampur), is the commercial centre of southern Odisha and is known as the "Silk City" for its Berhampur Patta sarees.
According to the district administration, Ganjam takes its name from the old township and European fort of Ganjam on the northern bank of the Rushikulya river. Other derivations have also been suggested, including the ancient name Kongoda and the Persian word ganj, meaning a granary or market.
Ganjam district came into existence on 1 April 1936, when it was separated from the Madras Presidency and joined to the new province of Orissa. It is one of the oldest administrative units of the state. On 2 October 1992 its south-western part was carved out to form Gajapati district.
The district covers 8,206 sq km by the Census figure (the district administration gives 8,070.6 sq km). It has three sub-divisions, Chhatrapur, Brahmapur and Bhanjanagar. Odia is the main language, and Telugu is spoken by about 7% of residents as a first language, reflecting the long border with Andhra Pradesh. The local speech, Ganjami, is one of the main Odia dialects.

