Castelvetere in Val Fortore

{{Infobox Italian comune

| name = Castelvetere in Val Fortore

| official_name = Comune di Castelvetere in Val Fortore

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| image_skyline = Castelvetere_in_Val_Fortore_-_panorama_1.jpg

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| image_shield = Castelvetere in Val Fortore-Stemma.png

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| coordinates = {{coord|41|27|N|14|56|E|type:city(1,665)_region:IT|display=inline,title}}

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| region = Campania

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| province = Benevento (BN)

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| mayor = Gianfranco Mottola

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| area_total_km2 = 34.58

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| elevation_m = 706

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| population_total = 1094

| population_as_of = 1 January 2021

| population_footnotes ={{cite web |url=http://demo.istat.it/pop2020/index3_e.html |title=Resident population |publisher=Istat |date=1 January 2020 |accessdate=20 March 2021 |archive-date=31 August 2021 |archive-url=https://web.archive.org/web/20210831200256/http://demo.istat.it/pop2020/index3_e.html |url-status=dead }}

| population_demonym = Castelvetresi

| postal_code = 82023

| area_code = 0824

| istat = 062020

| saint = St. Nicholas{{cite web |url=http://www.comuni-italiani.it/062/020/index.html |title=Comune di Castelvetere in Val Fortore |publisher=Comuni di Italia |accessdate=20 March 2021}}

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| website = {{official website|http://www.comune.castelvetereinvalfortore.bn.it/}}

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Castelvetere in Val Fortore is a comune (municipality) in the Province of Benevento in the Italian region Campania, located about 90 km northeast of Naples and about 35 km northeast of Benevento in the upper valley of the Fortore River (Sannio).