Colle San Magno

{{Infobox Italian comune

| name = Colle San Magno

| official_name = Comune di Colle San Magno

| native_name =

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| image_shield = Colle San Magno-Stemma.png

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| coordinates = {{coord|41|33|N|13|42|E|type:city(818)_region:IT|display=inline}}

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| region = Lazio

| province = Frosinone (FR)

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| mayor_party =

| mayor = Valentina Cambone

| area_footnotes =

| area_total_km2 = 44.8

| population_footnotes =

| population_total = 636

| population_as_of = 31st December 2021

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| population_demonym = Collacciani

| elevation_footnotes =

| elevation_m = 540

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|istat=| saint = St. Magnus

| day = 19 August

| postal_code = 03030

| area_code = 0776

| website = {{official website|http://www.comune.collesanmagno.fr.it/}}

| footnotes =

}}

Colle San Magno (locally {{lang|it|Glio Colle}}) is a comune (municipality) in the Province of Frosinone in the Italian region Lazio, located about {{convert|110|km|mi}} southeast of Rome and about {{convert|30|km|mi}} southeast of Frosinone.

Its name refers to St. Magnus of Anagni.{{cite web|url=http://www.santiebeati.it/dettaglio/93374|author=Arduino, Fabio|title= San Magno di Anagni (o da Trani)|date=March 13, 2007|publisher=Santi e Beati|accessdate=December 27, 2008}} The town was founded in the 11th century, and it was later ruled by the D'Avalos and, from the 16th century, by the Boncompagni. In 1796 it was acquired by the Kingdom of Naples.

Attractions include the medieval castle, the old asphalt mines and the church of S.M. Assunta.