The reigning All-Australian captain was reaffirmed as his club's skipper late on Wednesday.
The 2006 premiership backman heads into what is widely expected to be his last season as Eagles skipper for his fifth year.
His reappointment to head West Coast's on-field troops was released through the Eagles Twitter account with official confirmation early evening.
Tough half-back Beau Waters remains as vice-captain to Glass and heir-apparent to the top job at the end of this season or at latest after 2014.
Glass, 31, has played 242 Eagles games and won club champion awards in 2007, '09 and again in 2011.
He is expected to see out the 2013 season on the final year of a contract before making any firm decision on whether to play beyond this year.
The disciplined and highly competent key defender was a first round draft selection at number 11 overall back in 1999.
He is a four-time All-Australian with selections in 2006-07 and then the past two years as his form continues to shine as one of the tightest backmen in the business into his twilight years.
Eagles coach John Worsfold announced the decision after his match committee’s decision was ratified by chairman Alan Cransberg and West Coast board of directors.
“Our board last night ratified our decision to make Darren captain again for 2013,” Worsfold said.
“Darren has been a wonderful leader for our club and will continue in that role for at least another season.
“Beau Waters will also continue as vice-captain and there will be a leadership group to support those players.
“Darren has said in the last couple of years that he would like to hand over the captaincy at some point, but all feel he has a tremendous amount to contribute in the role.
"Importantly, his teammates want him to remain as captain.
“Beau Waters continued to shine as a leader last year, winning All-Australian honours and recently being added as the players’ representative on the AFL rules committee, showing his impact both on and off field.”