Russian Classification of Territories of Municipal Formations (Russian: ? ? ? ), or OKTMO (Russian: ), is one of several Russian national registers. OKTMO organizes information about the structure of the municipal divisions of Russia.
The document assigns numeric codes to each municipal division of the country.
OKTMO is used for statistical and tax purposes. It was adopted on December 14, 2005. It went into effect on January 1, 2014, replacing OKATO (Russian Classification on Objects of Administrative Division).