The First Anglo–Dutch War (called the First Dutch War in England, and the First English Sea-War in the Netherlands), the first of the four Anglo-Dutch Wars, is fought entirely at sea between the navies of the Commonwealth of England and the United Provinces of the Netherlands.

Caused by disputes over trade, the war begins with English attacks on Dutch merchant shipping, but expands to vast fleet actions.

The English Navy gains control of the seas around England, and forces the Dutch to accept an English monopoly on trade with England and English colonies.