Krylbo is a part of the town Avesta in Avesta Municipality, Dalarna County. It was a market town until it merged with the city of Avesta in 1966.
Krylbo is mostly known for being an important railway hub called Avesta-Krylbo. On July 19, 1941, a German train of five cars transporting ammunition exploded while standing at the Krylbo railway station. 24 people were injured.