Zeeland (Dutch: [ˈzeːlɑnt] ^ⓘ; Zeelandic: Zeêland [ˈzɪəlɑnt]), historically known in English by the exonym Zealand, is the westernmost and least populous province of the Netherlands. Located in the south-western corner of the country, it borders North Brabant to the east, South Holland to the north, and an international border with Belgium to the south and west (Flemish provinces of East and West Flanders).

Zeeland consists of a number of islands and peninsulas (hence its name, meaning "Sealand"), with only the southern part (Zeelandic Flanders) not being an island or peninsula. Its capital is Middelburg with a population of 48,544 as of November 2019, although the largest municipality in Zeeland is Terneuzen (population 54,589). Zeeland has two seaports: Vlissingen and Terneuzen. Its area is 2,933 square kilometres (1,132 sq mi), of which 1,154 square kilometres (446 sq mi) is water; it had a population of about 391,000 as of January 2023.

Large parts of Zeeland are below sea level. The last great flooding of the area was in 1953. Tourism is an important economic activity. In the summer, its beaches make it a popular destination for tourists, especially German tourists. In some areas, the population can be two to four times higher during the high summer season. The coat of arms of Zeeland shows a lion half-emerged from water, and the text luctor et emergo (Latin for "I struggle and emerge"). The country of New Zealand was named after Zeeland after it was sighted by Dutch explorer Abel Tasman.

Zeeland was a contested area between the counts of Holland and Flanders until 1299, when the last count of Holland died. The Counts of Hainaut then gained control of the County of Zeeland, followed by the counts of Bavaria, Burgundy, and Habsburg. After 1585, Zeeland followed, as one of the 7 independent provinces, the fate of the Northern part of The Netherlands.

In 1432, it became part of the Low Countries possessions of Philip the Good of Burgundy, the later Seventeen Provinces. Through marriage, the Seventeen Provinces became the property of the Habsburgs in 1477. In the Eighty Years' War, Zeeland was on the side of the Union of Utrecht, and became one of the United Provinces. The area now called Zeeuws-Vlaanderen (or Zeelandic Flanders) was not part of Zeeland, but a part of the county of Flanders (still under Habsburg control) that was conquered by the United Provinces, hence called Staats-Vlaanderen (see: Generality Lands).

After the French occupation (see département Bouches-de-l'Escaut) and the formation of the United Kingdom of the Netherlands in 1815, the present province Zeeland was formed.

During World War II, Zeeland was occupied by Nazi Germany between June 1940 and November 1944. In 1944, Zeeland was devastated by the Battle of the Scheldt and the Walcheren Landings, which brought about the Inundation of Walcheren, between British and Canadian forces, and the occupying Germans.

The catastrophic North Sea flood of 1953, which killed over 1800 people in Zeeland, led to the construction of the protective Delta Works.