Changfeng County () is a county of Anhui Province, East China, under the administration of the prefecture-level city of Hefei, the capital of Anhui, and is also its northernmost county-level division. The county has a surface of and a population of 629,535 inhabitants. It contains 9 towns, 6 townships, and a development zone.
In 2014 Changfeng County offered 1,000 RMB in cash ($140) to each family who gave newborns the mothers' surname, in order improve the imbalanced sex ratio.
Changfeng County is divided to 12 towns, 2 townships and 1 other.