NIPR

NIPR as an acronym may refer to:


 * NIPRNet, the Non-Classified Internet Protocol Router Network, a private IP network owned by the United States Department of Defense that is used to exchange unclassified information
 * National Institute of Polar Research (Japan), the Japanese research institute for Antarctica
 * Northern Ireland Publication Resource, now renamed NIPR: the National Collection of Northern Ireland Publications, held at the Linen Hall Library