Culture or time period
- Asian cultures11,789
- Asmat537
- Assiniboin4
- Assyrian30
- Asuka period (538–710 AD)20
- Atakapa2
- Atayal5
- Aterian2
- Athabascans of Lower Mad River1
- Athabaskan973
- Atikum15
- Atka7
- Atsakudökwa band of Northern Paiute2
- Atsugewi212
- Attalid dynasty (ca. 282–133 BC)2
- Attic Late Geometric (ca. 750–700 BC)1
- Attu5
- Aurignacian54
- Australian Historic27
- Austrian454