Ernest Alexandre Dominique d’Arenberg (26 December 1643 – 3 June 1686 in Pamplona) was the 10th Prince of Chimay.
He was the son of Philippe of Arenberg, 9th prince de Chimay, former governor of the Duchy of Luxembourg.
In the same year he married Maria de Cardenas in Madrid, a Lady-in-Waiting of the Spanish Queen.
Since he died without heirs, he was succeeded by his aunt Anna Katharina de Ligne.
After her death, the title of Prince of Chimay passed to the House of D'Henin-Lietard of her husband Eugène de Hénin, 6th Count of Bossu.