Changfeng County (simplified Chinese: 长丰县; traditional Chinese: 長豐縣; pinyin: Chángfēng Xiàn) is a county of Anhui Province, East China, it is under the administration of the prefecture-level city of Hefei, the capital of Anhui.

It is the northernmost county-level division of Hefei, the provincial capital.

The county has a surface of 1,922.24 km2 (742.18 sq mi) and a population of 629,535 inhabitants.

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.

[2][3] Changfeng County is divided to 12 towns, 2 townships and 1 other.