Seaton Delaval is a village and former civil parish, now in the parish of Seaton Valley, in Northumberland, England, with a population of 4,371. The largest of the five villages in Seaton Valley, it is the site of Seaton Delaval Hall, completed by Sir John Vanbrugh in 1727.

In 2010 the armed robbery of Jimmy's Fish Bar featured in news coverage of Raoul Moat's crime rampage.

The name 'Seaton Delaval' was first attested as 'Seton de la Val' in 1270. 'Seaton' simply means 'sea town', referring to the village's nearness to the North Sea. The land was held by the Delaval family, who took their name from Laval in Maine in France. Their descendants are still major landholders in the area today^[when?] and the current Lord Hastings is Delaval Astley, 23rd Baron Hastings.

The folk song ‘Blackleg Miner’ mentions the village:

From 1974 the village was part of the Blyth Valley borough, but as part of the 2009 structural changes to local government in England responsibility was transferred to Northumberland County Council. The village is in the NE25 post code area and the coastal town of Whitley Bay, Tyne and Wear. Unlike other parts of Northumberland, Seaton Delaval and the surrounding villages use the Tyne and Wear 0191 area code.

Seaton Delaval was formerly a township and chapelry in the parish of Earsdon, from 1866 Seaton Delaval was a civil parish in its own right, on 1 April 1935 the parish was abolished to form Seaton Valley, parts also went to Blyth and Whitley and Monkseaton. In 1931 the parish had a population of 7377.

The village is centred on the intersection of two main roads: the A192 road running from North Shields to Morpeth and the A190 road running from the Dudley village bypass to Seaton Sluice. These main roads are lined by terraced housing from the turn of the 20th century but large post-war and 1970s house development is predominant. There are small pockets of more recent housing and a new estate of houses was completed in 2012.

Nearby villages include: