D. Luís da Cunha (pronounced [luˈiʒ ðɐ ˈkuɲɐ]; 25 January 1662 – 9 October 1749) was a Portuguese diplomat who served under King John V of Portugal as part of His Most Faithful Majesty's Council.

During his childhood, he lived in the Palace of the Counts of Cunha, in the Bairro Alto neighborhood, which was the headquarters of the Academia dos Generosos, founded by his father, where intellectual and influential people met.

In 1696, he was appointed envoy extraordinary to London, where he participated in important negotiations related to the Portuguese intervention in the War of the Spanish Succession, the most complex political event of the time.

After the signing of the Treaty of Utrecht, 1715, he returned to London as envoy extraordinary, by request of the newly crowned King George I of Great Britain.

The idea was proposed as a means of affirmation and advancement of the Kingdom of Portugal, while at the same time guaranteeing its security from European powers.