But the lead lasted just four minutes as Jamie Vardy's spot-kick earned the Foxes a draw after Andy King was brought down in the box by Chris Lowe.
The hosts then found the back of the net again with an Elias Kachunga header but it was wrongly ruled offside and the goal disallowed.
Check out Examiner Football Writer Blake Welton's quick-fire talking points from the game below.
Chris Lowe’s rush of blood to the head to concede a penalty gave Leicester City an easy way back into the game.
Moan of the Match
Town’s inability to really put sides to the sword when in the ascendancy is still a minor concern for David Wagner
Man of the Match
Tweet of the Match
Jonathan Moss (West Riding) - An erratic performance from the man in the middle, got the penalty right but offside wrong.
Another great sound from the 24,169 John Smith's Stadium crowd, roaring on David Wagner's men throughout.
To come away disappointed not to have grabbed all three points once again underlines Huddersfield Town are good enough to compete at this level.