ITSA may refer to:
Indian Telecommunication Service Officers` Association in India Insolvency and Trustee Service Australia Instituto Tecnológico Superior Aeronáutico in Ecuador Intelligent Transportation Society of America, an advocate for Intelligent Transportation Systems in the United States Information Technology Services Agency an executive agency of the Department of Social Security in the UK ITSA Film Festival (Imagination, Talent, Shorts, Animation) - a Film Festival in Sonora, California