Mile Oak is a locality forming the northern part of the former parish of Portslade in the northwest corner of the city of Brighton and Hove, England.

[1] The Portslade Aldridge Community Academy is located at Chalky Road and houses a public library,[2] although Brighton and Hove City Council announced in June 2023 that it would close the following month.

In 1935, a contributor to the Sussex County Magazine described "an old oak that stood on the roadway until about 30 years ago, when it gradually rotted away ... it was on the west side of the road, about a mile [north of] the old George Inn on [Portslade] High Street".

[4] Brighton Corporation bought Mile Oak Farm on 2 January 1890 with the intention of building a waterworks and pumping station there.

It was in an isolated position north of Mile Oak Farm on the slopes of the South Downs; this seclusion made it an ideal location.

Work to replace this temporary facility began in June 1966, and on 28 October 1967 the new Church of the Good Shepherd was dedicated.

[11] Mile Oak Gospel Hall, a place of worship for the Church of God (Needed Truth Brethren), was built on Chalky Road in 1966.

Hove Borough Council sold land to the community for £500, and construction cost £6,000; most of this was raised by the sale of the congregation's former chapel in Portslade.

The Campaign for Real Ale have listed it as a "Heritage Pub" with a historic interior of regional importance, noting the prevalence of original features and the retention of its traditional three-bar layout.

[18] East Sussex County Council bought 12 acres (4.9 ha) of land at Mile Oak in 1937 and built Portslade Girls' School on the site.

[21] Portslade Industrial School, a "handsome structure of red brick", was built jointly by London County Council (who ran it from 1913) and Brighton Corporation in 1904 at a cost of £30,000.

It closed in 1977, and after a brief period when the sixth form of Portslade Community College occupied it, the building and its attached farm were demolished and the site redeveloped for housing.

[22] Mile Oak Primary School opened in September 1965 on a site on Graham Avenue bought by East Sussex County Council 11 years earlier.

By the start of the 21st century it had grown to be the largest primary school in the city of Brighton and Hove; an extension was built in 1999 at a cost of £475,000.

[23] Downs Park is an area of late 20th-century housing at the eastern edge of Mile Oak, between the estate and Hangleton.

The area has no community facilities of its own,[25] although the large West Hove Sainsbury's supermarket is at the southern edge of the estate.

[28] A connecting road to the Mile Oak estate (Fox Way) was built the early 1990s but did not open until January 1996.

A bypass for Brighton and Hove, rerouting the A27 trunk road away from inner suburban areas, was first discussed in the 1920s, but the borough and county councils only voted in favour of one in 1980–81.

A route looping tightly around the northern boundary of the Mile Oak estate and the rest of the urban area was chosen.

The Brighton & Hove bus company run regular services around the Mile Oak estate on routes 1 and 1A.

The "Mile Oak Shuttle", an express service to central Brighton using buses in a special livery, ran from 1982 to 1992.