- ACIR stands for Advisory Commission on Intergovernmental Relations (Washington, DC)
- ACIR stands for Agricultural Coalition for Immigration Reform
- ACIR stands for Advisory Committee on Investor Responsibility (various universities)
- ACIR stands for Advanced Computational Infrastructure and Research
- ACIR stands for Adjacent Channel Interference Ratio
- ACIR stands for Advanced Certified Internet Recruiter (certification)
- ACIR stands for Automated Check Issue Reporting
- ACIR stands for Availability Centered Inventory Rule
ACIR