2018–19 FIS Cross-Country Alpen Cup

The 2018–19 FIS Cross-Country Alpen Cup (OPA Cup) was a season of the Alpen Cup, a Continental Cup season in cross-country skiing for men and women. The season began on 21 December 2018 in Valdidentro, Italy and concluded on 17 March 2019 in Oberwiesenthal, Germany.