Uncastillo

{{Expand Aragonese|Uncastiello|fa=yes|date=April 2009}}

{{Infobox settlement

| official_name = Uncastillo

| nickname =

| image_flag = Bandera de Uncastillo.svg

| image_shield = Escudo de Uncastillo.svg

| image_skyline = Vista de Uncastillo (Zaragoza, Aragón).jpg

| map_caption =

| pushpin_map = Spain

|pushpin_label_position =

|pushpin_map_caption =

|coordinates = {{coord|42|22|N|1|08|W|region:ES|display=inline,title}}

| subdivision_type = Country

| subdivision_name = Spain

| subdivision_type1 = Autonomous community

| subdivision_name1 = Aragon

| subdivision_type2 = Province

| subdivision_name2 = Zaragoza

| subdivision_type3 = Comarca

| subdivision_name3 = Cinco Villas

| leader_title = Mayor

| leader_name = Gemma de Uña

| area_magnitude =

| area_total_km2 = 231

| area_land_km2 =

| area_water_km2 =

| elevation_m =

| population_demonym =Uncastilleros

| 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

| timezone = CET

| utc_offset = +1

| timezone_DST = CEST

| utc_offset_DST = +2

| website =

| footnotes =

| }}

Uncastillo (Aragonese: Uncastiello) is a municipality in the province of Zaragoza, Aragon, eastern Spain. At the 2010 census,Instituto Nacional de Estadística (Spain) it had a population of 781.

Along with Sos d'o Rei Catolico, Exeya d'os Caballers, Sádaba and Tauste, Uncastillo is one of the five towns comprising the comarca of Cinco Villas.

In 1966 Uncastillo was declared a Conjunto Histórico-Artístico. It has several Romanesque buildings, including the parish churches of St. Martin and Santa Maria, and the churches of San Felices, San Andrés and San Juan. Its other landmarks include the castle and palace of Peter IV (14th century).