Colleretto Castelnuovo

{{Infobox Italian comune

| name = Colleretto Castelnuovo

| official_name = Comune di Colleretto Castelnuovo

| native_name =

| image_skyline = Colleretto_catelnuovo_torre_medioevale.jpg

| imagesize =

| image_alt =

| image_caption = Medieval tower.

| image_shield = Colleretto_Castelnuovo-Stemma.png

| shield_alt =

| image_map =

| map_alt =

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| coordinates = {{coord|45|25|N|7|41|E|type:city(331)_region:IT|display=inline}}

| coordinates_footnotes =

| region = Piedmont

| metropolitan_city = Turin (TO)

| frazioni =

| mayor_party =

| mayor = Marina Carlevato

| area_footnotes =

| area_total_km2 = 6.3

| population_footnotes =

| population_total = 358

| population_as_of = 31 December 2010All demographics and other statistics: Italian statistical institute Istat.

| pop_density_footnotes =

| population_demonym = Collerettesi

| elevation_footnotes =

| elevation_m = 585

| twin1 =

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| postal_code = 10080

| area_code = 0124

| website =

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}}

Colleretto Castelnuovo is a comune (municipality) in the Metropolitan City of Turin in the Italian region of Piedmont, located about {{convert|40|km|mi}} north of Turin.

Colleretto Castelnuovo borders the following municipalities: Castellamonte, Cintano, Borgiallo, and Castelnuovo Nigra.