Croatia national under-21 football team

Croatia U21
Nickname(s)Mladi Vatreni (The Young Blazers)
AssociationCroatian Football Federation (HNS)
ConfederationUEFA (Europe)
Head coachIvica Olić
CaptainBartol Franjić
Most capsLuka Ivanušec (28)
Top scorerTomislav Bušić (13)
FIFA codeCRO
First colours
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Second colours
First international
 Croatia 6–1 Hungary 
(Zagreb, Croatia, 14 October 1992)
Biggest win
 Croatia 10–0 San Marino 
(Zagreb, Croatia, 8 October 2020)
Biggest defeat
 Spain 6–0 Croatia 
(Alicante, Spain, 10 September 2012)
UEFA U-21 Championship
Appearances5 (first in 2000)
Best resultQuarter-finals (2021)
Websitehns-cff.hr

The Croatia national under-21 football team represents Croatia in international football matches for players 21 or under. It is governed by the Croatian Football Federation, the governing body for football in Croatia. It is a member of UEFA in Europe and FIFA in global competitions. The team's colours reference two national symbols: the Croatian checkerboard and the country's tricolour. They are colloquially referred to as the Mladi vatreni ('Young Blazers'). So far, the Mladi vatreni qualified for five UEFA European Under-21 Championships, namely in 2000, 2004, 2019, 2021 and 2023. Croatia was unable to pass the group stage until the 2021 Euro when it was eliminated in the quarter-finals, its greatest accomplishment in the European competition so far.