Gesse

{{Infobox river

| name = Gesse

| image =

| image_caption =

| map = Gesse (rivière).png

| source1_location = Arné

| source1_coordinates= {{coord|43|09|17|N|00|28|00|E}}

| mouth = Save

| mouth_coordinates = {{coord|43|26|04|N|00|51|06|E|display=inline,title}}

| progression = Save→ {{RGaronne}}

| subdivision_type1 = Country

| subdivision_name1 = France

| length = {{convert|52.1|km|mi|abbr=on}}

| source1_elevation = {{convert|550|m|ft|abbr=on}}

| mouth_elevation = {{convert|175|m|ft|abbr=on}}

| discharge1_avg =

| basin_size =

}}

The Gesse ({{IPA|fr|ʒɛs}}; {{langx|oc-gascon|Gessa}}) is a {{convert|52.1|km|mi|abbr=on}} long river in the Hautes-Pyrénées, Haute-Garonne and Gers départements, southwestern France.{{sandre|id=O24-0400|nom=La Gesse}} Its source is at Arné, on the plateau de Lannemezan. It flows generally northeast. It is a left tributary of the Save into which it flows at Espaon.