O
- (Eure-et-Loir) Ormoy
- (Indre-et-Loire) Oizay
- (Eure-et-Loir) Ormoy
- (Eure-et-Loir) Ormoy
- (Cher) Orrot
- (Eure-et-Loir) Orsonville
- (Eure-et-Loir) Orval
- (Eure-et-Loir) Ossonville
- (Eure-et-Loir) Ouancé
- (Eure-et-Loir) Ouerray
- (Eure-et-Loir) Outrouville
- (Indre) Ozans
- (Eure-et-Loir) Ozée
- (Indre-et-Loire) Oiré
- (Indre-et-Loire) Orsay
- (Loiret) Ourcis
- (Loir-et-Cher) Orme Guignard
- (Loir-et-Cher) Ourcelle
- (Loir-et-Cher) Origny
- (Loir-et-Cher) Orgie
- (Eure-et-Loir) Ormeville
- (Loiret) Orme
- (Loiret) Ondreville
- (Loiret) Ouvrouer-les-Champs
- (Indre-et-Loire) Oliveau
- (Eure-et-Loir) Occonville
- (Eure-et-Loir) Ohé
- (Loiret) Oimpuits
- (Loiret) Orme
- (Loiret) Onville