Season ticket sales had broken the 10,000 barrier even before the final whistle sounded on the 2009/10 campaign.
And since Tigers' dramatic victory at Twickenham last week the figure has increased by a further 20 per cent with more than 12,000 supporters already booking their places for 2010/11.
Managing director David Clayton said: "We were delighted to break the 10,000 barrier before the final whistle had been blown on the season and we've had a tremendous response following our victory in the Guinness Premiership Final.
"We've now sold another 2,000 season tickets in a week, which is remarkable.
"To have more than 12,000 supporters committed to joining us for next season at this stage is tremendous news.
"It is a tribute to the team, to the players and to the strength of the support for Leicester Tigers from our fans.
"One thing we have noticed in the last 12 months is the support for the club from a wider geographical area and this is reflected in the season ticket sales from right across the Midlands and beyond."
Tigers season ticket prices start from just £280 for adults and £99 for juniors.
There are price categories for adults, 65-plus, young adults and full-time students, juniors and families. And an easy-payment plan is available to spread the cost over six months.
A Tigers season ticket includes every home game in the Guinness Premiership, pool rounds of Europe's Heineken Cup and the LV= Cup, plus the pre-season fixture against 2010 Magners League finalists Leinster on Saturday, August 28.
It also entitles supporters to some great benefits, including priority application for knockout matches, away games and internationals, 10-per-cent discount in the Tigers Club Shop, two complimentary tickets for friends and family for a match of your choice, and an exclusive invitation to a Tigers training session.
Supporters can book season tickets by visiting the ticket office at Welford Road, phoning the hotline on 0844 856 1880 or click here to log on to the tickets pages of the club website.
For more information, click here to download season ticket packs from the club website.
