Castel Guelfo di Bologna

{{Infobox Italian comune

| name = Castel Guelfo di Bologna

| official_name = Comune di Castel Guelfo di Bologna

| native_name =

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| image_shield = Castel Guelfo di Bologna-Stemma.svg

| image_flag = Castel Guelfo di Bologna-Bandiera.svg

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| coordinates = {{coord|44|26|N|11|41|E|type:city(3,731)_region:IT|display=inline}}

| coordinates_footnotes =

| region = Emilia-Romagna

| metropolitan_city = Bologna (BO)

| frazioni = Poggio Piccolo, Via Larga

| mayor_party =

| mayor = Cristina Carpeggiani

| area_footnotes =

| area_total_km2 = 28.6

| population_footnotes =

| population_total = 4489

| population_as_of =31 December 2014 All demographics and other statistics: Italian statistical institute Istat.

| pop_density_footnotes =

| population_demonym = Guelfesi

| elevation_footnotes =

| elevation_m = 32

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| postal_code = 40023

| area_code = 0542

| website = {{official website|http://www.comune.castelguelfo.bo.it/}}

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}}

Castel Guelfo di Bologna (Eastern Bolognese: {{lang|egl|Castèl Guêlf}} or {{lang|egl|Castelghèif}}) is a comune (municipality) in the Metropolitan City of Bologna in the Italian region Emilia-Romagna, located about {{convert|30|km|mi}} southeast of Bologna.

Castel Guelfo di Bologna borders the following municipalities: Castel San Pietro Terme, Dozza, Imola, Medicina.