Northaw is a village in the Welwyn Hatfield district of Hertfordshire, England.

[3] The parish church of Thomas à Becket is Grade II listed.

The manor of Northaw was held by St Albans Abbey in the Middle Ages.

It was rebuilt in the 16th century, although the exact date remains unclear: according to John Stow, writing in about 1600, it was rebuilt by Cavendish before 1552; but according to John Norden in 1598, the builder was a later owner, Ambrose Dudley, 3rd Earl of Warwick, some time after 1576.

[6][7] In March 1597, Anne Russell, Countess of Warwick, described Northaw as a "cold, bare and moist place, yet a near neighbour to Tibbols".