Voglajna

{{for|the settlement in Šentjur, Slovenia|Voglajna, Šentjur}}

{{Infobox river

| name = Voglajna

| name_other =

| image = Postcard of Voglajna.jpg

| image_size = 180

| image_caption = Postcard of the Voglajna in Celje

| source1_location =

| source1_coordinates=

| mouth_location = Savinja

| mouth_coordinates = {{coord|46.2211|15.2662|region:SI|display=inline,title}}

| progression = {{RSavinja}}

| subdivision_type1 = Country

| subdivision_name1 = Austria, Slovenia

| length = {{convert|35|km|mi|abbr=on}} {{GeoQuelle|SI|SURS}}

| source1_elevation =

| discharge1_avg =

| basin_size = {{convert|412|km2|sqmi|abbr=on}} {{GeoQuelle|SI|SURS}}

}}

The Voglajna ({{IPA|sl|ʋɔˈɡlaːi̯na|pron}}) is a river in Styria, Slovenia. The river is {{convert|35|km}} long (including its source river, the Ločnica), and its catchment area is {{convert|412|km2|sqmi|abbr=on}}.{{GeoQuelle|SI|SURS}} Its source is Lake Slivnica ({{langx|sl|Slivniško jezero}}) near Slivnica pri Celju. It passes Šentjur, the ruins of Rifnik Castle, and Štore, and then merges with the Savinja River in Celje.