It is located at the northern end of Hampstead Road and next to Mornington Crescent tube station.

In the middle is Harrington Square Gardens which is a public green space.

Numbers 15 to 24, which form the entirety of the north-eastern side except Hurdwick House, are grade II listed buildings.

The south side of the square originally had terraces similar to the listed north-eastern side, but was bombed in World War II and replaced by the modern Ampthill Square Estate.

[2] Harrington Square has been the location of a number of murders recently, including one in 2012,[6] one in 2018[7] and one in 2020.