2011 in Bellator MMA was the fourth installment of the Bellator Fighting Championships. Mixed martial arts tournaments were held in multiple weight classes, including three of the original tournament classes: Welterweight, Lightweight and Featherweight. There was also an inaugural Light Heavyweight Tournament taking place during this season, which crowned the first Light Heavyweight Champion in Bellator. This was the first season to air on MTV2.

Bellator 35 was a mixed martial arts event held by Bellator Fighting Championships. The event took place on March 5, 2011, at the Tachi Palace Hotel and Casino in Lemoore, California. The card kicked off Bellator Season Four and featured opening round fights in the Season Four Welterweight Tournament. The event was distributed live in prime time by MTV2.

On December 14, 2010, Bellator and MTV2 announced a three-year deal to broadcast Bellator's tournaments and special events. This will be the first Bellator event to air on MTV2.

Bellator's Women's Strawweight Champion Zoila Frausto fought in a non-title catchweight bout against Karina Hallinan.

At this event Steve Carl was expected to fight Jay Hieron in the opening round of the welterweight tournament. However, Carl injured himself during training and was removed from the tournament. His replacement was Anthony Lapsley.

Poppies Martinez was expected to fight at this event, but a bout never materialized.

The event drew an average of around 200,000 viewers on MTV2. Which helped MTV2 in several key advertising demographics including, an 83 percent increase among men aged 18 to 49, an 80 percent increase among men 18 to 34, and a 133 percent increase among men aged 25 to 34.

Bellator 36 was a mixed martial arts event held by Bellator Fighting Championships. The event took place on March 12, 2011, at the Shreveport Municipal Auditorium in Shreveport, Louisiana. The card featured opening-round fights in the Bellator Season Four Lightweight Tournament. The event was distributed live in prime time by MTV2.