Skip to main content - Orr, Kay (1939–)
- Orr, Vickie (1967–)
- Orsini, Belleza (d. 1528)
- Ortese, Anna Maria (1914–1998)
- Orthryth of Mercia (fl. 7th c.)
- Ortiz Calvo, Tania (1965–)
- Ortiz Charro, Yahima (1981–)
- Ortíz de Dominguez, Josefa (c. 1768–1829)
- Ortiz, Cristina (1950–)
- Ortiz, Letizia (1972–)
- Orton, Beth (1970–)
- Ortrud of Schleswig-Holstein-Sonderburg-Glucksburg (1925–)
- Orvieto, Laura (1876–1953)
- Orwig, Bernice (1976–)
- Orzeszkowa, Eliza (1841–1910)
- Osadchaya, Liliya (1953–)
- Osato, Sono (1919–1953)
- Osborn, Daisy (1888–1957)
- Osborn, Emily Mary (1834–c. 1885)
- Osborn, Sarah (1714–1796)
