Ahja (river)

{{Short description|River in Estonia}}

{{expand Estonian|date=July 2023|topic=geo}}

{{Infobox river

| name = Ahja

| image = Ahja_jõgi_2013_06.jpg

| image_caption = The Ahja River

| pushpin_map = Estonia

| pushpin_map_size =

| pushpin_map_caption= Location of mouth

| pushpin_map_alt =

| source1_location = Lake Erastvere

| mouth = Emajõgi

| mouth_location =

| mouth_coordinates = {{Coord|58|23|6|N|27|9|27|E|display=it|region:EE_type:river_source:GNS-enwiki}}

| progression = {{REmajõgi}}

| subdivision_type1 = Country

| subdivision_name1 = Estonia

| length = {{convert|103.4|km|abbr=on}}

| source1_elevation = {{convert|87|m|abbr=on}}

| discharge1_avg =

| basin_size = {{convert|1,074.3|km2|abbr=on}}

}}

The Ahja ({{langx|et|Ahja jõgi}}) is a river in Estonia. The river is {{convert|103.4|km}} long. The river begins at Lake Erastvere and empties into the Emajõgi River. The river's middle course is protected by the Ahja River Valley Landscape Conservation Area.