Despite sitting way down in the Championship table, the Canaries have managed to sell 16,939 tickets for the 2009/10 season.
The total is the second-highest first deadline total in the club's history and Doncaster has hailed the unwavering supporters as they look to secure second-tier football next season.
"At this stage in the season ticket renewal process it is an incredible result," he told the club's official website.
"It is a terrific testament to the unbelievable loyalty our supporters have shown us over the years.
"There's still lots to play for and we'll be doing what we can to try and get those numbers as high as possible."