Aldgate is a South Australian town located 21 kilometres south-east of Adelaide, in the Adelaide Hills.
The town of Aldgate was supposedly named in 1882 after the local hotel the Aldgate Pump, which was named by Richard D. Hawkins, who had additionally opened the nearby Crafers Inn. The hotel was named after the pump he had installed outside, and Aldgate in London, England, which is an Old English derivation of old gate.
As the pump became popular to water the horses and bullock teams which passed through the area on their way south to the Echunga goldfields. By 1870, a small settlement had been established with many buildings remaining to this day. Hawkins claimed at that time that some 60,000 people a year passed through the hotel's doors. The hotel became quite famous. At one point it was described as 'one of the best decorated of its kind in the colony' with 'magnificent chandeliers'
The Hills Land and Investment Company subdivided land in the Aldgate area for settlement in 1882. For a few months in 1883 it was the end of the railway line from Adelaide. In November of that year, the railway was extended through to Nairne.
Aldgate is the site of Stangate House and Garden, a property bequeathed in 1975 to the National Trust of South Australia. The house was built in 1940 and is well known for its stunning gardens.