Highland was not incorporated as a city until July 13, 1977.
Starting with the 1900 US Census, the census place listed for those living in the area was "Highland Precinct" in Utah County, Utah. We are also including the 1880 census - the early residents of the area were enumerated with American Fork and Alpine. 1950 is the most recent census available publicly.
Source: HIGHLAND HISTORY: A compilation by Charles T Greenland II for the Highland Historical Society