'''OPR''' may refer to:
* Office of Planning and Research, an agency of the California government * Office of Population Research, the oldest population research center in the United States * Office of Professional Responsibility, part of the United States Department of Justice * Office of Professional Responsibility (IRS), part of the United States Internal Revenue Service responsible for investigating suspected practitioner misconduct * Office of Public Roads, a predecessor of the United States Federal Highway Administration * Official Pattern Release, used by Trend Micro to refer to the definitions for their antivirus products * Oregon Pacific Railroad (1880–94), in Oregon, United States * Oregon Pacific Railroad (1997), in Oregon, United States * Old Parochial Registers of the Church of Scotland * Output Recordings, a British independent record label run by Trevor Jackson, between 1996–2006 * Outward Processing Relief, a 1989 U.K. statutory instrument * Overall pressure ratio, the ratio of the stagnation pressure as measured at the front and rear of the compressor of a gas turbine engine * Overland Park Regional Medical Center, a hospital in Overland Park, Kansas * Overnight Policy Rate, an overnight interest rate set by Bank Negara Malaysia used for monetary policy direction * Owner's project requirements, a foundational document for the design and commissioning of buildings; see New-construction building commissioning * Rodrigues People's Organisation (''Organisation du Peuple Rodriguais''), a Mauritian political party * P. Ravindhranath, an Indian politician known as OPR, the son of O. Panneerselvam (OPS)
==See also== * Operator (disambiguation)
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