By way of comparison, it's got similar search volume as Algol: http://www.google.com/trends?q=common+lisp%2C+algol&ctab... . It loses to Erlang and OCaml: http://www.google.com/trends?q=common+lisp%2C+erlang%2C+ocam... , and Clojure: http://www.google.com/trends?q=common+lisp%2C+clojure&ct... . It's well below Haskell: http://www.google.com/trends?q=common+lisp%2C+haskell&ct... .