Gaztelu

{{About|the settlement in Spain|the footballer|José Agustín Aranzábal}}

{{No footnotes|date=January 2021}}

{{Infobox settlement

| official_name = Gaztelu

| settlement_type =

| image_skyline = File:Lagarteko buelta 02.jpg

| image_caption =

| image_flag =

| image_seal =

| nickname =

| pushpin_map = Spain Basque Country#Spain

| pushpin_label_position =

| pushpin_map_caption = Location of Gaztelu within the Basque Country

| coordinates = {{coord|43|6|59|N|2|1|22|W|source:kolossus-ruwiki|display=inline,title}}

| subdivision_type = Country

| subdivision_name = Spain

| subdivision_type1 = Autonomous community

| subdivision_name1 = Gipuzkoa

| subdivision_type2 = Province

| subdivision_name2 =

| subdivision_type3 =

| subdivision_name3 =

| leader_title =

| leader_name =

| area_total_km2 = 9.15

| area_land_km2 =

| area_water_km2 =

| elevation_m =

| population_as_of = {{Spain metadata Wikidata|population_as_of}}

| population_footnotes = {{Spain metadata Wikidata|population_footnotes}}

| population_total = {{Spain metadata Wikidata|population_total}}

| population_density_km2 = auto

| population_demonym =

| timezone = CET

| utc_offset = +1

| timezone_DST = CEST

| utc_offset_DST = +2

| website =

| footnotes =

}}

Gaztelu is a village and municipality located in the province of Gipuzkoa, in the autonomous community of Basque Country, northern Spain.