The college roll in the early 1960s hovered around the 180 mark, as the facilities were strictly limited and no more could be accommodated. The site was only one and a quarter acres, so while this was a period of great expansion in numbers in the other QGSSSA girls' schools, Moreton Bay College remained a small school and found it harder to meet growing commitments in an ever-expanding QGSSSA competition. Eventually, in the early 1970s, Moreton Bay College withdrew from QGSSSA sport on the understanding that it could return when numbers increased sufficiently.