Ameca may refer to:
- Ameca, a monotypic ray-finned fish genus in the family Goodeidae, with the only species Ameca splendens
- Ameca shiner (Notropis amecae), an extinct species of ray-finned fish in the family Cyprinidae
- Ameca, Jalisco, a city and municipality in central Jalisco
- Chiefdom of Ameca, a pre-Columbian state in Jalisco
- Ameca Valley, a large expansive plateau in Jalisco
- Ameca River
- Amecameca, in the State of México, often informally abbreviated to "Ameca"