Huerter, 23, is the latest core member of a young Hawks roster to secure a contract extension.
"It was important to our group to secure Kevin as a part of our team moving forward," said Hawks president and general manager Travis Schlenk said in a statement. "He's developed into a versatile, two-way player who can fit any lineup and can play minutes all over the perimeter. We are excited his future is in Atlanta."
The 6-foot-7 Huerter -- who averaged 11.1 points, 3.8 rebounds and 2.8 assists in the postseason during the Hawks' run to the Eastern Conference finals -- has shown himself to be a versatile wing player and an ideal backcourt complement to All-Star point guard Trae Young.
Huerter, who was chosen 19th overall in the 2018 NBA draft, has started 156 of his 200 games in three seasons with the Hawks.