An alpaca is a South American camelid.

Alpaca or ALPACA may also refer to:

Alpaca fiber, the fleece of the Alpaca

ALCAPA (tectonic plate), see Carpathian Mountains § Geology

Anomalous left coronary artery from the pulmonary artery, a rare congenital anomaly

Dynetics Autonomous Logistics Platform for All-Moon Cargo Access (ALPACA), the Dynetics entry for the NASA Human Landing System lunar lander competition

The refinement of LLaMA, a large language model from Meta AI, by the Stanford Center for Research on Foundation Models