Populations of the great raft spider are found throughout Europe in Austria, Belarus, Belgium, Czech Republic, Denmark, Estonia, Finland, France, Georgia (country), Germany, Hungary, Italy, Latvia, Lithuania, Norway, the Netherlands, Poland, Romania, Russia, Slovakia, Sweden, Switzerland and the United Kingdom [REF].
In 1956 an outlying population was discovered for the first time in the United Kingdom at Redgrave and Lopham Fen by arachnologist Eric Duffey.