The 2014 Wales Summit of the North Atlantic Treaty Organization (NATO) was the summit of the heads of state and heads of government of the NATO countries, held in Newport, Wales on 4 and 5 September 2014. Such summits are sporadically held and allow leaders and officials from NATO Allies to discuss current issues of mutual concern and to plan strategic activities. The 2014 summit has been described by US Navy Admiral James G. Stavridis as the most important since the fall of the Berlin Wall.

The summit was hosted by British Prime Minister David Cameron. Attendees included Canadian Prime Minister Stephen Harper, US President Barack Obama, German Chancellor Angela Merkel, French President François Hollande, Italian Prime Minister Matteo Renzi and Spanish Prime Minister Mariano Rajoy.

There were another 180 VIPs, and 4,000 delegates and officials from approximately 60 countries.

The official logo for the summit included a panel with four quadrants, each bearing a stylised symbol of Newport or Wales: a Celtic knot, the Welsh Dragon, Newport Transporter Bridge and a Welsh castle. The entrance to the venue was fronted by a full-scale replica of a Eurofighter Typhoon.

World leaders met at the Celtic Manor, and informally at other locales in and around Cardiff. They discussed ongoing events in the world, such as terrorism, cyberwarfare, and other areas of national security interest to the member states.

Ukrainian President Petro Poroshenko had a joint discussion with EU big four leaders and US President Barack Obama before the official start of the Summit, to discuss the crisis with Russia.

The following declarations and agreements were made at the Summit:

Immediately prior to the summit on 3 September 2014 French President François Hollande announced the postponement of delivery of the first Mistral-class amphibious assault ship which had been sold to Russia, a ship provisionally named Vladivostok, due to the Russo-Ukrainian War.