Bou Ismaïl

{{Infobox settlement

| official_name = Bou Ismaïl

| native_name = بواسماعيل

| other_name =

| settlement_type = Commune and town

| image_skyline = Bou Ismaïl.JPG

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| image_map = Dz - 42-26 - Bou Ismail - Wilaya de Tipaza map.svg

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| map_caption = Location of Bou Ismaïl within Tipaza Province

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| pushpin_label_position = bottom

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| subdivision_type = Country

| subdivision_name = {{flag|Algeria}}

| subdivision_type1 = Province

| subdivision_name1 = Tipaza Province

| subdivision_type2 = District

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| unit_pref = Imperial

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| population_as_of = 1998

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| timezone = CET

| utc_offset = +1

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Bou Ismaïl ({{langx|arq|بو إسماعيل}}) is a city in Bou Ismaïl District, Tipasa Province, Algeria. In 2008 it had a population of 40,984.[http://www.populstat.info/Africa/algeriat.htm populstat.info] {{webarchive|url=https://web.archive.org/web/20160303175036/http://www.populstat.info/Africa/algeriat.htm |date=2016-03-03 }} Its French colonial name was Castiglione.