Olcenengo

{{Infobox Italian comune

| name = Olcenengo

| official_name = Comune di Olcenengo

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| image_shield = Olcenengo-Stemma.png

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| coordinates = {{coord|45|22|N|8|19|E|type:city(635)_region:IT|display=inline}}

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| region = Piedmont

| province = Vercelli (VC)

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| mayor = Ercole Gaibazzi

| area_footnotes =

| area_total_km2 = 16.5

| population_footnotes =

| population_total = 635

| population_as_of = 2004All demographics and other statistics: Italian statistical institute Istat.

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| population_demonym = Olcenenghesi

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| postal_code = 13040

| area_code = 0161

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Olcenengo (Osnengh in Piedmontese) is a comune (municipality) in the Province of Vercelli in the Italian region Piedmont, located about {{convert|60|km|mi}} northeast of Turin and about {{convert|10|km|mi|0}} northwest of Vercelli.

Olcenengo borders the following municipalities: Caresanablot, Casanova Elvo, Collobiano, Quinto Vercellese, San Germano Vercellese, and Vercelli.