Clarence (river)

{{Infobox river

| name = Clarence

| image = Lapugnoy-6762.jpg

| image_caption = The Clarence in Lapugnoy

| pushpin_map = France#France Hauts-de-France

| source1_location = Picardie

| mouth_location = Lys

| mouth_coordinates = {{coord|50|38|16|N|2|38|45|E|format=dms|display=inline,title}}

| progression = {{RLys}}

| subdivision_type1 = Country

| subdivision_name1 = France

| length = {{convert|33|km|mi|abbr=on}}

}}

The Clarence is a river in northern France whose {{convert|33|km|mi|adj=on}} course crosses the department of Pas-de-Calais.{{sandre|id=E3640620|nom=La Clarence}}

Its source is near the village of Sains-lès-Pernes. It flows through the communes of Sachin, Pernes, Calonne-Ricouart, Calonne-sur-la-Lys and Gonnehem, finally joining the Lys near Merville.

It has two tributaries, the Nave and the Grand Nocq.