The Courage Cornwall League 1 1987–88 was the first full season of rugby union within the ninth tier of the English league system, currently known as Tribute Cornwall League 1. Illogan Park finished the league season unbeaten, and as the first champions were promoted to the Courage Cornwall/Devon League for season 1988–89. Stithians lost all ten matches, finishing in last place and were relegated to Courage Cornwall League 2, along with St Just who finished one place above them.
