The Imam found the Koran in a brown envelope, which showed up at his mosque on East 198th Street at around noon Saturday.
There were also papers inside the envelope covered with cartoon like drawing depicting hatred towards Muslims.
The Imam also found white powder inside the envelope. Tests determined the powder was actually pieces of the burnt Koran.
The envelope had several stamps on the front, but lacked a postal delivery stamp.
No arrests were made and it was not clear why the burnt Koran was delivered to the mosque.
The incident is being investigated by the hate NYPD's Hate Crimes Task Force.