Ankara Mayor Melih Gokcek Tuesday presented a framed copy of his municipality's decision to rename the street to the widow of Andrei Karlov.
Municipality workers then replaced the street sign with one inscribed with Karlov's name, AP reported.
Karlov was shot dead on Dec. 19 while speaking at the opening of a photo exhibition. The killer, an off-duty policeman, was also shot dead in a police operation.
Turkish and Russian leaders have said the attack was aimed at derailing newly restored ties between their two countries.
Turkey says the policeman had links to a movement led by a US-based preacher who opposes President Recep Tayyip Erdogan.