Turner Valley was a town in the Calgary Metropolitan Region of Alberta, Canada within the Town of Diamond Valley. It is on Highway 22, 3 km west of Black Diamond and approximately 60 km southwest of Calgary. It was named after Robert and John Turner who settled in the area in 1886.The town was once the centre of an oil and natural gas boom. For 30 years, the Turner Valley oilfields were a major supplier of oil and gas and the largest producer in the British Empire.