Odo of Arezzo or Abbot Oddo () was a medieval monk who worked in Arezzo, active as composer and music theorist.
ˈoʊdoʊ ʌv ɚɹˈɛzoʊ ɔːɹ ˈæbət ˈɑːdoʊ wʌzɐ mˈɛdɪˌiːvəl mˈʌŋk hˌuː wˈɜːkt ɪn ɚɹˈɛzoʊ, ˈæktɪv æz kəmpˈoʊzɚ ænd mjˈuːzɪk θˈiəɹɪst.