David Wagner says the club has made “a big statement” by making defender Kongolo their club-record signing.
The Netherlands international, 24, ended last term on loan from Monaco and helped the Terriers avoid relegation in their inaugural Premier League season.
He has now joined Town permanently on a four-year deal for an undisclosed fee.
Wagner said: “We knew he was a top player when we brought him in on loan. However, he exceeded our expectations.”
What a great asset of a great team!
“Terence gives us a fantastic option at centre-back and at left-back, and the way that he defends on the front foot is perfect for our style,” added Wagner.
“It’s exciting for us to think he can still get better and better from the high level he’s already at.