JGR can refer to: Japanese Government Railways Java Gui for R, a user interface in the R programming language JGroups, a Java library Jet Grind Radio, a video game Joe Gibbs Racing, American professional racing organization John G. Roberts, Jr. (born 1955), Chief Justice of the United States Journal of Geophysical Research, a peer-reviewed scientific journal Journal of Genocide Research a peer-reviewed academic journal for genocides Jessica González-Rojas (born 1976), New York State Assemblymember for the 34th Assembly District