UCA

UCA can stand for:

Companies:
 * UCA, a manufacturer of rail car movers
 * Usine de Construction Aéronautique (UCA), merged into Société Nationale de Constructions Aéronautiques du Sud Ouest

In computing:
 * Unicode collation algorithm

In education:
 * Université Clermont-Auvergne, a public university in Clermont-Ferrand, France.
 * Universal College Application, an online consortium-based college admissions application
 * University of Central Arkansas, a public university in Conway, Arkansas, United States
 * University for the Creative Arts, England
 * Universidad Centroamericana (Managua), a university in Managua, Nicaragua
 * Universidad Centroamericana (San Salvador) or Universidad Centroamericana "José Simeón Cañas", San Salvador, El Salvador
 * University of Cádiz, Spain
 * University of Central Asia
 * Upper Columbia Academy, Spangle, Washington
 * Pontifical Catholic University of Argentina
 * United Christian Academy, Bloomington, MN

In health:
 * Urgent Care Association

In religion:
 * Unitarian Christian Association, UK
 * Universalist Church of America, 1866 to 1961
 * Uniting Church in Australia

In sports:
 * Universal Cheearleaders Association

Other uses:
 * UCA, the IATA code for Oneida County Airport
 * UCA, a codon for the amino acid serine
 * Under color addition