• Japan Institute of Architects
• Jacksonville International Airport, medium-to-large airport in the city of Jacksonville, Florida.
• Jetstream International Airlines, now known as PSA Airlines
• Jewish Internet Association, non-profit California Public Benefit Corporation
• Joint Israel Appeal, charitable appeal on behalf of disadvantaged in Israel
• Johannesburg International Airport, large airport near the city of Johannesburg, South Africa
• Journal of the Institute of Actuaries, former name for the peer-reviewed journal published by the Institute of Actuaries
• Juvenile Idiopathic Arthritis, disease of joints in young people

Jia might be

• Chinese film director Jia Zhangke
• one of two Chinese counties, see Jia County (disambiguation)