- Ottampatti
- Ottapatti
- Ottappatti
- Ovalūr
- Odavandāngudi
- Okkūr
- Okkūr
- Olaiyāmputtūr
- Olugamangalam
- Orattūr
- Ottaittattai
- Overkudi
- Odakkādu
- Odakkattūr
- Odappālaiyam
- Odappalli
- Oduvankurichchi
- Olaippālaiyam
- Olaippālaiyam
- Olaippālaiyam
- Olaippālaiyam
- Olaippālaiyam
- Olaippatti
- Olāngkāttūr
- Olappālaiyam
- Olurappatti
- Oravandūr
- Ottaiyūr
- Ottakulampudūr
- Oviyampālaiyam