Notiophilus aestuans is a species of ground beetle native to Europe and the Near East (Ireland, Great Britain, Denmark, Norway, Sweden, Finland, France, Belgium, Netherlands, Germany, Switzerland, Austria, Czechia, Slovakia, Hungary, Poland, Estonia, Latvia, Lithuania, Belarus, Ukraine, Spain, Italy, Slovenia, Croatia, Bosnia-Herzegovina, former Yugoslavia, North Macedonia, Albania, Greece, Bulgaria, Moldova, Syria, Turkey, Iran, Georgia, Armenia, Azerbaijan, Russia).