Isabella Isaksen (born November 20, 1993) is a modern pentathlete from the United States who competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil.

Isaksen qualified for the 2016 Olympics after the re-allocation of unused quota places on June 16, 2016.

Isaksen is married to the Egyptian-born American Olympic modern pentathlete Amro El Geziry.

She has one sibling, older sister Margaux Isaksen, who made the United States Olympic Team in modern pentathlon in 2008, 2012, and 2016.

This biographical article related to modern pentathlon in the United States is a stub.