Fei (simplified Chinese: 费; traditional Chinese: 費; pinyin: Fèi) is a traditional Chinese surname.

Two of them are from the State of Lu during the Spring and Autumn period (722–481 BC), part of present-day Shandong province.

A senior official of the state of Lu was granted a city named Fei, while the son of a certain duke was granted a county named Fei.

Both of these place names were adopted by descendants as surnames.

A third source of the name is Fei Zhong, a high minister of the Yin Dynasty (1401–1122 BC).