The year 2005 was the 13th year in the history of the Ultimate Fighting Championship (UFC), a mixed martial arts promotion based in the United States. In 2005 the UFC held 10 events beginning with, UFC 51: Super Saturday. The reality TV series The Ultimate Fighter and the first UFC Ultimate Fight Night both premiered on Spike TV. The Ultimate Fighter 1 Finale was the first live UFC broadcast on non-pay-per-view television.
This was the first year that the late UFC senior editor Thomas Gerbasi published the year-end awards on UFC.com.
The following fighters fought their first UFC fight in 2005:
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UFC Ultimate Fight Night (also known as UFC Fight Night 1) was an event held on August 6, 2005, at the Cox Pavilion in Las Vegas, Nevada. The event, aired on Spike, was the first UFC Fight Night event.
The following fighters were honored in the October 2011 book titled UFC Encyclopedia.