Sir Hugh Myddelton (or Middleton), 1st Baronet (1560 – 10 December 1631)[a] was a Welsh clothmaker, entrepreneur, mine-owner, goldsmith, banker and self-taught engineer.

[2] Myddelton is best remembered as the driving force behind the construction of the New River, an ambitious engineering project to bring clean water into London.

In 1617, Myddelton obtained large profits from lead and silver mines at Bronfloydd, Cwmerfyn and Cwmsymlog in Cardiganshire, Wales.

Working those mines involved building aqueducts to serve the stamp mills needed to crush the ore.

[2] He died in December 1631 at Bush Hill, London, and was buried in the church of St. Matthew Friday Street.

Bounded by the former course along the valley of Turkey Brook, Myddelton House at Bulls Cross, Enfield (now the headquarters of the Lee Valley Regional Park Authority) was also named in his honour; it was built by Henry Carrington Bowles (formerly a print and map maker of St Paul's Churchyard) whose wife, Anne Garnault, was a member of a Huguenot family with a controlling interest in the New River Company.

Myddelton Avenue in Finsbury Park, parallel to Brownswood Road and the site of one of the New River Reservoirs, also is named for him.