Angelica Quadrangle Map
1906 and 1938 United States Geological Survey maps of northwestern Allegany County. Includes a list of towns covered.
Belmont Quadrangle Map
1925 and 1939 United States Geological Survey maps of southwestern Allegany County. Includes a list of towns covered.
Canaseraga Quadrangle Map
1916 United States Geological Survey map of northeastern Allegany County. Includes a list of towns shown.
Wellsville Quadrangle Map
1926 United States Geological Survey map of southeastern Allegany County. Includes a list of towns shown.