Arnasco

{{Infobox Italian comune

| name = Arnasco

| official_name = Comune di Arnasco

| native_name =

| image_skyline = Arnasco-panorama1.jpg

| image_caption = Arnasco

| image_shield = Arnasco-Stemma.svg

| shield_alt =

| image_map =

| map_alt =

| map_caption =

| pushpin_label_position =

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| coordinates = {{coord|44|5|N|8|6|E|type:city(576)_region:IT|display=inline,title}}

| coordinates_footnotes =

| region = Liguria

| province = Savona (SV)

| frazioni =

| mayor_party =

| mayor = Alfredino Gallizia

| area_footnotes =

| area_total_km2 = 6.0

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

| population_total = 625

| population_as_of = 30 April 2017

| pop_density_footnotes =

| population_demonym = Arnaschesi

| elevation_footnotes =

| elevation_m = 250

| twin1 =

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| saint =

| day =

| postal_code = 17032

| area_code = 0182

| website =

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}}

Arnasco ({{langx|lij|Arnascho}} or {{lang|lij|Arnasco}}) is a comune (municipality) in the Province of Savona in the Italian region of Liguria, located about {{convert|80|km|mi}} southwest of Genoa and about {{convert|40|km|mi}} southwest of Savona.

Arnasco borders the following municipalities: Albenga, Castelbianco, Cisano sul Neva, Ortovero, Vendone, and Zuccarello.