Huddersfield Town Under 21s are Professional Development League II champions.
Already the North section winners, Frankie Bunn's side were 2-1 victors over Sheffield United in the play-off final.
A bumper 4,018 turned out at Bramall Lane to see right-back Jacob Hanson slot an 85th-minute winner.
All the goals came in the final 10 minutes as centre-back William Boyle headed Town in front before Ben Whiteman equalised.
Town coach Frankie Bunn fielded Under 16 keeper Ryan Schofield and Under 18 quartet Jacob Hanson, Regan Booty, Lewis O'Brien and Jack Boyle.
William Boyle, back after a loan spell at York City, was alongside Danny Kane in central defence and Flo Bojaj, who has scored one goal for the first team, at the top of a 4-2-3-1 formation.
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Meanwhile the Blades, playing 4-4-2, called on first teamers Louis Reed in midfield and Che Adams up front.
Town forced a succession of early corners, and from one taken from the right, skipper Booty hit the base of the near post.
The first home chance came on 14 minutes, but Schofield blocked Diego De Girolamo's shot with his legs.
Republic of Ireland junior international Kane was on hand to divert David Brooks' effort away from goal.
Then Schofield made a smart save to thwart Terry Kennedy as he met a corner with a powerful header.
Bojaj's lay-off set up Jack Boyle for a 31st-minute shot which whistled over before United's Reed volleyed too high from a long throw
Lively Italian De Girolamo posed Town a danger when he cut in from the right, but he pulled his shot wide of the near post.
Just before the break home keeper Aaron Ramsdale raced out his his area to clear from Ronan Coughlan.
Town stopper Schofield was grateful to Booty for his rescue act after a weak goal kick early in the second half almost let the Blades in
Then William Boyle headed a De Girolamo free-kick off target before Schofield parried an angled effort by the same player.
United were posing problems from set plays, and Schofield did well to save another Kennedy header.
Another fine Schofield stop thwarted De Girolamo before Jack Boyle made way for Jordan Williams on 69 minutes.
The fresh legs in midfield made a difference because after Bojaj hooked a close-range effort over, Williams' cross-cum-shot was headed home by Boyle on 81 minutes.
There was a swift response as Adams played in Whiteman to square matters.
But Town weren't to be denied and the persistent Williams won possession to tee up Hanson for a winning shot which went though the keeper's legs.
Town: Schofield, Hanson, Senior, Booty, W Boyle, Kane, O'Brien, Coughlan, J Boyle (Williams, 69mins), Bojaj, Charles.
Subs not used: Brooke, Scott, Horsfall, Wilkinson.
