Moor Park is a London Underground station in the Three Rivers district of Hertfordshire, serving those living on the Moor Park estate, and also on the neighbouring Eastbury and South Oxhey estates. The station is outside the Greater London boundary but is in both Zone 6 and Zone 7, and is served by the Metropolitan line between Rickmansworth (on the Chesham & Amersham branch) or Croxley (on the Watford branch) and Northwood.

The route extension from Pinner to Rickmansworth opened in 1887 by the Metropolitan Railway. Shortly after in 1899, Great Central Railway trains also passed here, following the Metropolitan via Verney Junction. Moor Park didn't open until 9 May 1910, and the station was called Sandy Lodge, after the Sandy Lodge Golf Course. It was renamed to Moor Park & Sandy Lodge in 1923 to reflect the area it was in. The lines were electrified in 1925 when the Watford branch was opened and electric-hauled trains passed to Rickmansworth to exchange the traction for steam. In 1950 the station was renamed to Moor Park and it was completely rebuilt in 1961, increasing the number of platforms to four: two for northbound trains (one for slow/semi-fast and one for fast services) and two for southbound trains to the city. British Rail and Network SouthEast trains stopped calling at Moor Park from 1993.

Since the 2011 timetable, fast and semi-fast trains have only run during peak times. The fast trains to Aldgate call from platform 2 during the morning peak, and to Amersham or Chesham from platform 1 during the evening peak. At all other times, and all day at weekends, trains depart from platforms 3 and 4, providing all station or semi-fast services to Baker Street or Aldgate going southbound, and to Watford, Amersham or Chesham northbound.

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  Northbound fast platform looking south (platform 1)
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  Southbound fast platform looking north (platform 2)
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  Northbound slow (all stations) platform looking south (platform 3)
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  Southbound slow (all stations) platform looking north (platform 4)
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  Station platform Roundel
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  Rear entrance on the London-bound side, on the footpath to Sandy Lodge
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  Moor Park tube station
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  A suburban diesel toward Marylebone along the western platform.
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  Moor Park tube station. Opened in 1910 as Sandy Lodge for the local golf course.

• London Transport Museum Photographic Archive
  • Moor Park station platforms, 1944
  • Moor Park station platforms, 1962
  • Moor Park station entrance, 2001

Preceding station	London Underground			Following station
Croxley towards Watford		Metropolitan line		Northwood Semi-fast (peak hours only)/All Stations service towards Baker Street or Aldgate
Rickmansworth towards Amersham or Chesham				Harrow-on-the-Hill Fast service (morning peak hours only) towards Baker Street or Aldgate
Historical railways
Rickmansworth towards Aylesbury		Chiltern Lines London to Aylesbury Line		Harrow-on-the-Hill towards Marylebone