A large granite outcrop outside the town called
Mount Monster was a basis for the area's name until it was surveyed in 1884 and officially proclaimed Keith in 1889. It is believed that the town is named after the home town of the
Governor of South Australia at the time,
Lord Kintore. His home in
Aberdeenshire in Scotland was called Keith Hall and he was also known as
Earl of Kintore. The post office opened around 1874 as Mount Monster and was renamed Keith in 1904. In 1905 the general store was opened, and in 1907 the education department rented rooms out of the local institute to use as the school. 1910 saw the opening of Keith Hotel and the town's provisional school became a public school in 1912. During the 1940s, the
CSIRO found prosperity in the area. With the addition of
trace elements, the area became very productive. The
AMP Society funded the clearing of land to set up farming establishments. A
Land Rover sits atop a pole in a historical landmark in the town. In 1957, the local school was made into an area school to accommodate the influx of students. On 16 March 2000, boundaries were created for the locality of Keith. These align with those of the cadastral unit of the
Hundred of Stirling and include the town of Keith. ==Today==