Gastouni

{{Infobox Greek Dimos

|name = Gastouni

|name_local = Γαστούνη

|type = municipal unit

|image_map = DE Gastounis.svg

|map_caption = Location within the regional unit

|periph = West Greece

|periphunit = Elis

|municipality = Pineios

|pop_municunit = 11204

|population_as_of = 2021

|area_municunit = 59.325

|elevation = 5

|coordinates = {{coord|37|52|N|21|15|E|format=dms|display=inline,title}}

|postal_code = 273 00

|area_code = 26230

|licence = ΗΑ

|website =

|image_skyline = Church of Panagia Katholiki (Gastouni) (02).jpg

|caption_skyline =

|city_flag =

|city_seal =

|districts =

}}

Gastouni ({{langx|el|Γαστούνη}}) is a town and a former municipality in Elis, West Greece, Greece. Since the 2011 local government reform it is part of the municipality Pineios, of which it is the seat and a municipal unit.{{Cite web|url=http://www.et.gr/idocs-nph/search/pdfViewerForm.html?args=5C7QrtC22wGYK2xFpSwMnXdtvSoClrL81-32jgAMSfbnMRVjyfnPUeJInJ48_97uHrMts-zFzeyCiBSQOpYnT00MHhcXFRTsb2fGphpq4MKX2ZkaHobySNnvZCNHXvYVvlf80XevW0Q.|title=ΦΕΚ B 1292/2010, Kallikratis reform municipalities|language=el|publisher=Government Gazette}} The municipal unit has an area of 59.325 km².{{cite web |url=http://dlib.statistics.gr/Book/GRESYE_02_0101_00098%20.pdf |publisher=National Statistical Service of Greece |title=Population & housing census 2001 (incl. area and average elevation) |language=el |url-status=dead |archiveurl=https://web.archive.org/web/20150921212047/http://dlib.statistics.gr/Book/GRESYE_02_0101_00098%20.pdf |archivedate=2015-09-21}} Gastouni is situated in a flat rural area, 5 km from the Ionian Sea. The river Pineios flows into the sea near Gastouni. The town is {{convert|6|km|0|abbr=on}} south of Andravida, {{convert|4|km|0|abbr=on}} east of Vartholomio, {{convert|11|km|0|abbr=on}} northwest of Amaliada and {{convert|26|km|0|abbr=on}} northwest of Pyrgos. The Greek National Road 9/E55 (Patras - Pyrgos) and the railway from Patras to Pyrgos pass east of Gastouni. There is a 12th-century Byzantine church in the southwestern quarter Katholiki.[http://odysseus.culture.gr/h/2/eh251.jsp?obj_id=1719 Hellenic Ministry of Culture]