UDCA may refer to

• The University District Community Association of University District, Detroit
• Union de Defense Commercants et Artisans, a French political organization
• ursodeoxycholic acid
• Upside Down Count and Attitude, a signaling convention in the card game bridge

• Wabongo
• Waboom tree
• Wabos, Ontario
• WA Boufarik
• Wabowden, Manitoba
• Wabowden station
• W.A. Boyle
• W A Boyle
• WA Boyle
• Wabozominissing, Ontario
• WABP
• WABR-FM
• Wabrzeski
• Wabrzezno Commune
• WABT (disambiguation)
• Wabtec Corporation
• Wabuka Station
• Wabulacinus ridei
• Wabunowin
• Wabun Tribal Council
• Wabun, Virginia
• Wabush, Newfoundland and Labrador
• WABV
• WABY (AM)
• Wabynossée