Sant'Apollinare

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{{Infobox Italian comune

| name = Sant'Apollinare

| official_name = Comune di Sant'Apollinare

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| shield_size = 80px

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| coordinates = {{coord|41|24|N|13|50|E|type:city(1,972)_region:IT|display=inline}}

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| region = Lazio

| province = Frosinone (FR)

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| mayor = Enzo Scittarelli

| area_footnotes =

| area_total_km2 = 17.0

| population_footnotes =

| population_total = 1883

| population_as_of = 28 February 2017All demographics and other statistics: Italian statistical institute Istat.

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| population_demonym = Santapollinaresi

| elevation_footnotes =

| elevation_m = 51

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| postal_code = 03048

| area_code = 0776

| website = {{official website|http://www.comunedisantapollinare.it/}}

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Sant'Apollinare (locally Santapunaro or Santapunare) 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|50|km|mi}} southeast of Frosinone.

Sant'Apollinare borders the following municipalities: Cassino, Pignataro Interamna, Rocca d'Evandro, San Giorgio a Liri, Sant'Ambrogio sul Garigliano, Sant'Andrea del Garigliano, Vallemaio.

The town originated in 797, when Gisulf, abbot of Montecassino, created here a small monastic community. In the Middle Ages it had a castle commanding the Liri-Garigliano valley, now in ruins. It became part of the Lazio region in 1927. Due to its position across the Gustav Line, during World War II it suffered relevant destructions.