- ACLL stands for Archive of Celtic Latin Literature
- ACLL stands for Anti-Corn-Law League (UK)
- ACLL stands for Atypical Chronic Lymphocytic Leukemia
- ACLL stands for Allegheny County Law Library (Pittsburgh, PA)
- ACLL stands for Alameda County Law Library (Oakland, CA)
- ACLL stands for Amsterdam Circle for Law and Language
ACLL