HHL could refer to:
- Hafthohlladung, a German anti-tank mine of World War II
 - Handelshochschule Leipzig, now the HHL Leipzig Graduate School of Management
 - Haverhill (Amtrak station), in Massachusetts, United States
 - Harrow-Hassidim-Lloyd algorithm, a quantum algorithm for linear systems of equations
 - Heath High Level railway station, in Wales
 - Herefordshire Housing, a British social housing trust
 - Hecht-Hill-Lancaster Productions
 - Higher Hockey League, a Eurasian ice hockey league
 - Highway Hockey League, a Canadian ice hockey league
 
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