- DTCA stands for Direct-To-Consumer Advertising
- DTCA stands for Diphtérie, le Tétanos et la Coqueluche Acellulaire (French: Diphtheria, Tetanus and Acellular Pertussis)
- DTCA stands for Dutch Tax and Customs Administration (Netherlands)
- DTCA stands for Diabetes Treatment Centers of America (diabetes treatment network; various locations; now American Healthways)
- DTCA stands for Digital Temperature Control Amplifier (various companies)
- DTCA stands for D Trust Certifikacna Autorita (Slovak: D Trust Certification Authority)
- DTCA stands for Defect-Tolerant Computer Architecture
- DTCA stands for Dwell-Time Code Acquisition
DTCA