Apostolos Nikolaidis (Απόστολος Νικολαΐδης) (1896 - 15 October 1980) was a Greek athlete. He marked multisport club Panathinaikos (PAO) with his personality during the first years of the intervening period between the two world wars.

Apostolos Nikolaidis (Greek: Απόστολος Νικολαΐδης) (30 June 1938 - 22 April 1999) was a Greek singer whose career spanned four decades. He was born in Drama, Greece and grew up in Thessaloniki. He is best known for being the first Greek artist to record or re-record the authentic, "prohibited" rebetika songs in the early 1970s with their original lyrics at a time when this type of music was censored in Greece due to the military junta in power.