Dionicio is a given name. Notable people with the given name include:
Dionicio Cerón (born 1965), Mexican marathon runner Dionicio Escalante (born 1990), Mexican footballer Dionicio Gustavo (born 1983), Dominican karateka Dionicio Morales (1918-2008), American Latino civil rights leader Dionicio Rodriguez (1891–1955), Mexican-born, US-based artist and architect