The 24-year-old, who signed from Manchester City at the beginning of September, was Player of the Match in both of United Women's two league games during the month.
Park caught the eye in the 1-1 draw with Chelsea at the Progress with Unity Stadium, as the Reds became the first side to take points off the champions this term.
She was initially given a rest for the visit to Everton the following week but entered the fray as a substitute in the second half to help United come from behind.
Her two late goals turned it into a convincing 4-1 victory for Marc Skinner's side, although she suffered delayed concussion afterwards, which ruled her out of the UEFA Champions League game at Atletico Madrid, and England duty.