The acronym ROR may refer to:

• RAR-related orphan receptor
• Ror community or the Ror caste of North India
• ROR, the IATA code for Palau International Airport
• Rate of return, a comparison of the money earned or lost on an investment to the amount of money invested
• Risk of ruin, in gambling and investing
• RipOff Report, a consumer advocacy website
• Societatea Româna de Radiodifuziune, a member of the European Broadcasting Union
• Rhythms of Resistance, a network of political percussion bands
• Release on own recognizance, in legal terminology, a common police shorthand or expression
• Reach Out and Read, an American non-profit organization that advocates for childhood literacy
• Ragnarok Online Republic, also known as Ragna Republic
• Reague of Regends, a pun on League of Legends
• Raff out Roud
• Rules of the Road (nautical)
• Right Of Return, describing a consumers' right to return goods to a vendor
• Reaching Out Romania, a Romanian non-governmental charitable organization

The Ror community is found mainly to the north of New Delhi in India with most of their villages spread across the Karnal - Kurukshetra belt of Haryana and across those districts of Western Uttar Pradesh and Uttarakhand that are close to the Haryana border.