Genealogy Atlas has images of old American atlases during the years 1795, 1814, 1822, 1823, 1836, 1838, 1845, 1856, 1866, 1879 and 1897 for Kentucky and other states. The only years I found for Kentucky were 1814, 1822, 1836 and 1845.
The following maps that came from University of Kentucky 1999 Knox County Map and 1992 Knox County Map. The 1992 map has numbers for road names. The Index can be found here quadrants I and II and quadrants III, and IV.
The Topography map at Topozone is really neat. As Wikipedia explains it, in a broader sense, topography is concerned with local detail in general, including not only relief but also vegetative and human-made features.