Asa Fitch (February 24, 1809 – April 8, 1879) was a natural historian and entomologist from Salem, New York.

In 1838 he began to collect and study insects for New York state.

Fitch also discovered the rodent botfly Cuterebra emasculator in 1856.

He died April 8, 1879, at his home in Salem, New York.

Laboratory was added to the National Register of Historic Places in 2014.