- Odaiyenandal
- Odalavādi
- Odamangalam
- Odayakuppam
- Oddantāngal
- Oddapālaiyam
- Oddapālaiyam
- Oddarnattam
- Oddarvīdu
- Ogaiyūr
- Ogūr
- Olagalappādi
- Olagampattu
- Olaippādi
- Olappākkam
- Olukkavākkam
- Osūr
- Otteri
- Ottiyantangal
- Ochchalam
- Oclicheri
- Oddaneri
- Oddantāngal
- Oddappatti
- Oddateruvu
- Odiyattūr
- Odiyattūr
- Olakāchi
- Olalai
- Olugūr