Knoxville Junction is a populated place LOCATED WITHIN the City of Lamar. In turn, the City of Lamar is located within Johnson County.
Knoxville Junction is located at latitude 35.409 and longitude -93.385.
Since Knoxville Junction is located within the City of Lamar, all of the census and demographic data for residents of Knoxville Junction are included as part of the information reported for City of Lamar in the "Profile" tab above.