Blair Athol is located about 15 km (9 mi) north of the Adelaide CBD, South Australia. Blair Athol borders the suburbs of Gepps Cross, Enfield, Prospect and Kilburn. The suburb is rectangular, stretching from Grand Junction Road in the north to Angwin Avenue in the south between Prospect Road on the west and Main North Road on the east. Blair Athol's main and longest street is Florence Avenue.
Blair Athol was originally a private subdivision of section 357 in the Hundred of Yatala in the vicinity of today's Lionel Avenue. The suburb name was formalised in 1944 at which time the boundaries stretched from Grand Junction Road to Irish Harp Road (now Regency Road). In 2000, the portion south of Angwin Avenue and its easterly projection to Main North Road was annexed by Prospect.
The historic area known as Gepp's Cross (named for the busy intersection of Main North Road and Grand Junction Road) overlaps the north east corner of the modern suburb and includes the historic Gepps Cross Hotel (also known as Gepp's Cross Inn). The modern suburb of Gepps Cross occupies only the land north of the intersection.
Blair Athol Post Office opened on 15 June 1955 and was renamed Blair Athol West in 1966. At that time the existing Enfield office (open since 1852) was renamed Blair Athol and it was replaced by the Enfield Plaza office in 1997.
Blair Athol has two reserves, Blair Athol Recreational Reserve and Barton Street Reserve. The Blair Athol Recreational Reserve is a large reserve covering a total area of approximately 4.68 ha (11.6 acres). It features a football oval, a cricket ground with batting cages, two netball/basketball courts, and tennis courts which are exclusively used by members of the Kilburn tennis club. The reserve also has two playgrounds, a gazebo, the Kilburn Footy Club and a large parking lot. Barton Street Reserve features a large grass field and a playground with several benches. This reserve covers a total area of approximately 1.84 ha (4.5 acres).
Blair Athol is run by the City of Port Adelaide Enfield. The council was set up in 1996 and one of its main offices is located in Enfield. The South Australian Education Department helped set up the school system in Blair Athol and Kilburn. Blair Athol has three main schools. Gepps Cross Primary School and St. Paul Lutheran Primary School cater for levels 1–7. Gepps Cross Senior School is the only secondary school in Blair Athol and is partners with Enfield High School.
Blair Athol has one of the few family-owned hardware stores left, Randall's Hardware, next to another family-owned business Pets Everywhere. There was formerly a Coles Supermarkets located on the corner of Florence Avenue and Prospect Road. This supermarket ceased operation in July 2016, with the site to be redeveloped. It was reopened in 2017 as an IGA featuring products from Afghanistan, Iran and Pakistan. Kilburn Post Office is located across the road from it.
Blair Athol is serviced by the G10 bus line between Adelaide and Grand Junction Road, travelling via Prospect Road and also bus routes 221, 222, 224, 225, 226, 228 and 229, which travel between Adelaide and various destinations in the Northern suburbs via Main North Road. Residents of Blair Athol can also catch the train line to and from the city. The station is located in Kilburn, several hundred metres from Prospect Road.
- Australian Bureau of Statistics (27 June 2017). "Blair Athol (State Suburb)". 2016 Census QuickStats. Retrieved 1 August 2019.
- "Placename Details: Blair Athol". Property Location Browser. Government of South Australia. 11 March 2009. SA0007215. Retrieved 19 February 2019.
Derivation of Name: Possibly after the pace in Scotland; Dual Name: Other Details: Originally a private subdivision. World Book states that this name is Celtic for a plain cleared of trees, and takes its name from the home of the Magarey family. A W Reed states that Blair Athol in Queensland was named after a parish in Scotland in the vicinity of the Pass of Killiecrankie. Decision made on 18/9/1944 by City of Prospect to adopt this name as a suburb name. Portion taken and added to the suburb of Prospect in December 2000.
- Premier Postal History. "Post Office List". Premier Postal Auctions. Retrieved 26 May 2011.