Arnia (Hindi: अरनिया) is a town and a notified area committee in Jammu district in the state of Jammu & Kashmir, India.
Arnia is located at 32°31′N 74°48′E / 32.52°N 74.8°E. It has an average elevation of 269 metres (882 feet).
As of 2001 India census, Arnia had a population of 9057. Males constitute 52% of the population and females 48%. Arnia has an average literacy rate of 65%, higher than the national average of 59.5%; with 57% of the males and 43% of females literate. 12% of the population is under 6 years of age.