Helena, Helen, Jelena or Ilona of Hungary may refer to:

• Helen of Hungary, Queen of Croatia (died c. 1091), daughter of King Béla I of Hungary and wife of King Demetrius Zvonimir of Croatia
• Helena of Serbia, Queen of Hungary (after 1109–after 1146), wife of King Béla II of Hungary
• Helena of Hungary, Duchess of Austria (c. 1158–1199), daughter of King Géza II of Hungary and wife of Leopold V, Duke of Austria

• Basilica of the Immaculate Conception, Mongomo
• Basilica of the Immaculate Conception, Salvador
• Basilica of the Lord of Monserrate
• Basilica of the Maccabees
• Basilica of the Most Blessed Sacrament, São Paulo
• Basilica of the National Shrine of Our Lady of Aparecida
• Basilica of the National Shrine of Our Lady of Coromoto
• Basilica of the Nativity of Our Lady, Regensburg
• Basilica of the Nativity of Our Lady, Xagħra
• Basilica of the Sacred Heart, Notre Dame
• Basilica of the Sagrada Familia
• Basilica of the Shrine of the Immaculate Conception
• Basilica of the Transfiguration of Our Lord, Prüm
• Basilica of the Visitation, Gharb
• Basilica of the Visitation of Our Lady, Werl
• Basilica of the Visitation, Wambierzyce
• Basilica on the Holy Mountain, Głogówko
• Basilica on Święta Góra
• Basilica Opimia
• Basilica Porcia
• Basilica Sagrada Familia
• Basilica Sancti Petri in Vaticana
• Basilica-Sanctuary of Maria Santissima Annunziata
• Basilica San Pietro in Ciel d'Oro
• Basilica Sempronia