from 165 to 398 in three years up to 1940. Geography Belair is located 10 km south of Adelaide's city center. The suburb includes residential areas, but the majority of suburb's area of 14.58 km2 is taken up by Belair National Park, which has an area of 8.35 km2. To the north, the suburb is bounded by the neighbouring suburbs of Lynton and Torrens Park, Randell Park in Mitcham, and the localities of Brown Hill Creek and Crafers West. To the east it is bounded by Sheoak Road and the eastern edge of Belair National Park. To the south it is bounded by Upper Sturt Road. To the west it is bounded by Laffers Road, Gratton Street, Neate Avenue, Gum Grove, Watiparinga Reserve, and the Belair railway line. Parks and recreation Belair National Park the second-oldest national park in Australia and the oldest in South Australia, established in 1891. After pressure from the Native Fauna and Flora Protection Committee, it was decided in 1923 that all future plantings would consist only of native species of plants. The facilities in the park include walking and mountain biking trails, tennis courts, and ovals with cricket pitches and Australian rules football goalposts. It is also home to Old Government House and State Flora, the oldest plant nursery in South Australia. Other reserves in Belair include Sleeps Hill Reserve, at the former site of the Sleeps Hill quarries and Sleeps Hill railway station, and Windy Point, which has a lookout over the city and coastline. There are many shared use cycling and walking trails throughout Belair and the surrounding suburbs as part of Mitcham's Shared Use Trails network and Belair National Park. This includes the Randell Park Trails, the Lynton Reserve Trails (which goes through Sleeps Hill reserve), and the O'Deas Reserve, Saddle Hill and Ashby Reserve Trails. Climate Demographics At the 2021 census, Belair had a population of 4,896, up from 4,411 at the 2016 census and 4,390 at the 2011 census. Only 26 people identified themselves as Aboriginal and/or Torres Strait Islander people, making up just half a percent of the suburb's population, well below the national average of 3.2%. Belair is also an older suburb, with a median age of 47 compared with the national median age of 38. 89.6% of people only spoke English at home, and 75.0% reported that they were born in Australia. These were the most commonly