Ada, Countess of Atholl

Ada, Countess of Atholl (c. 1221 - 25 December 1266), was the daughter and heirof Forbhlaith, herself heir of the highland mormaerdom of Atholl, Scotland, and David of Hastings, England.

Her marriage to John de Strathbogie (a semi-Normanized Gael descended from Donnchadh II, Mormaer of Fife) gave rise to the Strathbogie dynasty of Atholl Earls, beginning with their son David (David of Strathbogie, 8th Earl of Atholl).

She died some time before 25 December 1266.