Larcis

{{Infobox river

| name = Arcis
Larcis

| image =

| image_caption =

| pushpin_map = France#France Nouvelle-Aquitaine

| source1_location = Luc-Armau

| mouth = Léez

| mouth_coordinates = {{coord|43.6312|-0.2325|display=it|region:FR_type:river}}

| progression = {{RLéez}}

| subdivision_type1 = Country

| subdivision_name1 = France

| length = {{convert|34.8|km|mi|abbr=on}}

| source1_elevation =

| discharge1_avg =

| basin_size =

}}

The ArcisPaul Raymond, Dictionnaire topographique du département des Basses-Pyrénées, Paris, Imprimerie Impériale, 1863, or Larcis{{sandre|id=Q10-0430|nom=Le Larcis}} (with article agglutination; {{langx|oc|Arsís}}) is a river in Southwestern France. It is a right tributary of the Léez, originating in the commune Luc-Armau in the east of the Pyrénées-Atlantiques. It joins the Léez in Lannux, in the French département of the Gers. It is {{convert|34.8|km|mi|abbr=on}} long.