2010–11 Rugby Pro D2 season

The 2010–11 Rugby Pro D2 was the season of the second-level French rugby union club competition, behind the Top 14, for the 2010–11 season. It runs alongside the 2010–11 Top 14 competition; both competitions are operated by the Ligue Nationale de Rugby (LNR).

Albi, who had become the first team to gain promotion back to the Top 14 only one year after being relegated in 2008, got immediately relegated again at the end of the previous Top 14 season. Bayonne finished second-to-bottom and were set to accompany Albi in Pro D2, but Montauban were revealed to have serious financial troubles and were relegated instead. A month later, the LNR's financial arm, DNACG, announced that Montauban would be further dropped to Fédérale 1, allowing Aix-en-Provence, who finished second-to-bottom in Pro D2, to stay. This meant that only the bottom finisher, Lannemezan, would be relegated to Fédérale 1 that year. Carcassonne and Saint-Étienne, last year's Fédérale 1 two finalists, gained promotion to Pro D2 for the first time in their history, whilst Agen and La Rochelle, respectively champions and promotion play-offs winners, were promoted to the Top 14.

Lyon, who lost the promotion final the previous year, established themselves as a candidate for the title from early on in the season along with recently relegated Albi. But whilst Albi struggled to keep their momentum after the Christmas break, Lyon managed to maintain their winning ways and held on to their top spot until the end of the season despite a remarkable finish by Grenoble, who had missed on a semi-final spot because of an unfavourable head-to-head against Pau the previous year, and who came back from a poor start to finish within two points of Lyon, the smallest margin between the top two teams since the establishment of the Pro D2, and seven points clear of Albi. In the promotion semi-finals, Albi saw off Mont-de-Marsan after extra time, while Grenoble couldn't capitalise on their home ground advantage and fell to fifth-placed Bordeaux-Bègles. In the final, Bordeaux-Bègles defeated Albi 21–14 to reach the Top 14 for the first time since Bordeaux and Bègles merged to form a new club in 2006.

The previous year's two losing semi-finalists, Oyonnax and Pau, both had disappointing seasons, finishing eighth and ninth, respectively. The two newly promoted teams, Carcassonne and Saint-Étienne, fared very differently. While Carcassonne enjoyed a very successful season, to the point that they looked like a credible candidate for the promotion playoffs for the first half of the season, ultimately finishing in tenth, Saint-Étienne had a nightmarish season, with a single win, one draw and twenty-eight losses, amounting to 17 points, the poorest-ever record in the Pro D2 (Lannemezan had finished with 19 points the previous year). Aix-en-Provence, who had been reprieved the previous year, looked like they were going to be part of a three-way battle with Dax and Colomiers to avoid the second relegation spot, but a string of victories in the second half of the season ensured that they would stay in Pro D2 for at least a third consecutive year. Dax and Colomiers fought until the last day, both finishing with 55 points, but a better head-to-head allowed Dax to clinch the coveted 14th spot, and sent Colomiers to Fédérale 1.