San Giorgio a Liri

{{Infobox Italian comune

| name = San Giorgio a Liri

| official_name = Comune di San Giorgio a Liri

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| coordinates = {{coord|41|24|N|13|46|E|type:city(3,146)_region:IT|display=inline,title}}

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| region = Lazio

| province = Frosinone (FR)

| frazioni = Torricelli, Cese, Iumari

| mayor_party =

| mayor = Modesto della Rosa

| area_footnotes =

| area_total_km2 = 15.71

| population_footnotes = All demographics and other statistics: Italian statistical institute Istat.

| population_total = 3112

| population_as_of = 30 November 2019

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| population_demonym = Sangiorgesi

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| elevation_m = 38

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| postal_code = 03047

| area_code = 0776

| website = {{official website|http://www.comune-sangiorgioaliri.it/}}

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San Giorgio a Liri is a comune (municipality) in the Province of Frosinone in the Italian region Lazio, located about {{convert|120|km|mi}} southeast of Rome and about {{convert|45|km|mi}} southeast of Frosinone.