31st AVN Awards was an event during which Adult Video News (AVN) presented its annual AVN Awards to honor the best pornographic movies and adult entertainment products of 2013.

The ceremony was held January 18, 2014, at The Joint in the Hard Rock Hotel and Casino, Paradise, Nevada. Movies or products released between October 1, 2012, and October 7, 2013, were eligible. Comedian/actress Rebekah Kochan and adult movie actresses Chanel Preston, who was co-winner of "Most Outrageous Sex Scene", and Samantha Saint hosted the AVN Awards. The awards show was held immediately after the Adult Entertainment Expo at the same venue.

Underworld took top honors as Movie of the Year, also winning Best Drama and seven other awards, including a directing award for Brad Armstrong.

Tommy Pistol was named Best Actor for his performance as Ashley J. Williams in adult horror film Evil Head. The coveted AVN Female Performer of the Year Award and AVN Best New Starlet Award went to Bonnie Rotten and Mia Malkova respectively. Axel Braun won Director of the Year for a record fourth consecutive time and Manuel Ferrara was awarded a record fifth Male Performer of the Year award. The new category of BBW Performer of the Year was won by April Flores. The Clever Title of the Year award was won by Seymore Butts for Cirque du Hole-A.

The categories for the 31st AVN Awards were released on September 20, 2013 and the finalists were announced on November 15, 2013.

Winners of categories announced during the awards ceremony January 18, 2014, are highlighted in boldface.

These awards were not presented during the awards ceremony itself but were announced before or after the show. In addition, Best 3D Release, Best Classic Release and Best Selling Title of the Year were on the list of award categories but were not presented in 2014.

The Reuben Sturman Award for battling for industry rights was not presented in 2014.