Legality of Cannabis by U.S. Jurisdiction Pennsylvania portal1950s portalUnited States portalHistory portal This category is for topics specifically related to the year 1951 in the U.S. state of Pennsylvania. 19461947194819491950195119521953195419551956 1900s1910s1920s1930s1940s1950s1960s1970s1980s1990s2000s Subcategories This category has the following 4 subcategories, out of 4 total. / 1951 disestablishments in Pennsylvania (9 P) 1951 establishments in Pennsylvania (27 P)E 1951 Pennsylvania elections (4 P)S 1951 in sports in Pennsylvania (23 P)