There are 8 sports listed by the NCAA as 'Fall Sports' and seven are played by all conferences and five have national polls. The ACC is #1 in four of the five sports:
Football - Clemson
Field Hockey- UNC
Men's Soccer - Wake Forest
Women's Soccer - UNC
Volleyball - Stanford
Football - Clemson
Field Hockey- UNC
Men's Soccer - Wake Forest
Women's Soccer - UNC
Volleyball - Stanford