Margaret Lynn von der Heide Spencer (born June 6, 1954, in Anchorage, Alaska) is a former, American cross-country skier who competed from 1975 to 1984.

She finished seventh in the 4 × 5 km relay at the 1984 Winter Olympics in Sarajevo.

Spencer-Galanes' best World Cup career finish was ninth in a 10 km event in Canada in 1983.

All results are sourced from the International Ski Federation (FIS).

This biographical article relating to American cross-country skiing is a stub.