The 22-year-old Stuttgart defender ran onto a left-wing cross from Lucas Hernandez and sent a right-footed half-volley spinning into the top corner to level eventual champions France's last-16 tie with Argentina at 2-2 in the 57th minute.
France kicked Argentina out after winning the match 4-3.
France went on to win the tournament, beating Croatia in the final.
Pavard's effort won a public vote to be named the best of the 169 goals scored in the tournament, seeing off competition from Colombian midfielder Juan Quintero's free-kick against Japan and Luka Modric's goal in Croatia's group-stage thumping of Argentina.
More than three million votes were logged on FIFA's website, football's world governing body said.