Carna may refer to:
Places Cârna, a commune in Dolj County, Romania Càrna, an island in Loch Sunart on the west coast of Scotland Carna, County Galway, a village in Connemara in the west of Ireland
Other an ancient Roman deity whose identity became confused with Cardea Carna Botnet, hijacked insecure devices online used to map IPv4 in 2012