Port Adelaide's SANFL football manager Scott Peters said the club was pleased to have commitments from a mix of talented positional players.
"These guys play a number of different roles for the team and it's great to have them on board," Peters told portadelaidefc.com.au.
"We're disappointed to lose a couple of blokes but having seven guys signed and on the list for next year is very positive.
"We expect most of the other positions on the list to come from within the existing Academy group and they've been training for a week already, so hopefully we see a few blokes stick their hand up this pre-season."
Eight positions on the contract player list remain vacant after the departures of Aseri Raikiwasa (to Woodville-West Torrens), Ben Haren (to South Adelaide) and the retirement of Henry Slattery.
All seven confirmed contract players commenced pre-season training last week.