Alcazar or variant spellings may refer to:

• Alcázar, a type of Islamic castle or palace in Spain and Portugal
  • All pages with titles beginning with Alcázar
  • All pages with titles containing Alcázar

• Alcazar (group), a Swedish europop/dance music group
• Alcazar: The Forgotten Fortress, a 1985 video game
• General Alcazar, a fictional character, friend of Tintin
• Roberto Alcázar y Pedrín [es], a Spanish comic from 1940
• Teatro Alcázar, a theatre in Madrid, Spain
• Alcazar (Paris) (later Alcazar d'Hiver), a café-concert in Paris 1858–1902
• Alcazar d'Été, a café-concert in Paris 1860–1914

• Alcazar Hotel (disambiguation), the name of several hotels
• Alcazar (airline), a 1993 proposed airline merger

• Alcàsser (Spanish: Alcácer), a municipality in Horta Sud, Valencian Community, Spain
• Alcázar de Colón, a fortified Spanish palace located in Santo Domingo, Dominican Republic
• Alcázar de los Reyes Cristianos, a medieval castle located in the historic centre of Córdoba, Spain
• Alcázar de San Juan, or Alcázar, a town and municipality in Ciudad Real, Castile-La Mancha, Spain
• Alcázar del Rey, a municipality in Cuenca, Castile-La Mancha, Spain
• Alcácer do Sal, a municipality in Setúbal District, Portugal
• Alcázar Genil, a medieval palace located in the historic centre of Granada, Spain
• Alcázar of Jerez de la Frontera, medieval castle in Jerez de la Frontera, Andalusia, Spain
• Alcázar of Segovia, medieval castle located in the city of Segovia, Castile and León, Spain
• Alcázar of Seville, a royal palace in Seville, Spain
• Alcázar of the Caliphs (Córdoba), remains of a former fortified medieval palace located in Córdoba, Spain
• Alcázar of Toledo, a fortified medieval palace located in Toledo, Spain
• El Alcázar, Misiones, a village in Argentina
• Gate of Sevilla (Carmona), also known as the Alcázar de la Puerta de Sevilla, remains of a former fortified medieval palace located in Carmona, Spain
• Los Alcázares, a municipality and a coastal spa town and former fishing village on the western side of the Mar Menor in Murcia, southeastern Spain
• Royal Alcázar of Madrid, a former fortress located at the site of today's Royal Palace of Madrid, Madrid, Spain
• Alcazar (Marseille), a library and former theatre in Marseille, France

• Baltasar del Alcázar (1530–1606), Spanish poet
• Paco Alcácer (born 1993), Spanish footballer

• El Alcázar, a Spanish newspaper 1936–1988
• Alcázar Basket, a former Spanish basketball team
• Hyundai Alcazar, a crossover SUV

• Alcazaba (disambiguation)
• Alcalá (disambiguation)
• Alcántara (disambiguation)
• Qasr (disambiguation)
• Alcocer (derives from a diminutive of alcázar), a municipality in Castile-La Mancha, Spain
• Alcocer de Planes, a municipality in Valencia, Spain
• Alcossebre, a town in Alcalà de Xivert, Valencia, Spain
• Ksar el-Kebir (Spanish: Alcazarquivir, Portuguese: Alcácer-Quibir), a city in northwest Morocco
• Siege of the Alcázar, 1936 Spanish Civil War event in Toledo