The newly turned 30-year-old has proved how popular she is, reaching the landmark figure on the social networking site.
The Keeping Up with the Kardashians star took to her Twitter page to thank her fans.
She wrote yesterday: 'I just realised I have passed three million friends on Facebook! Wow!
'I just want to thank you all for 'liking' me and being so supportive and amazing! I love you all.'
Kim recently moved to New York to shoot her new reality series Kim And Kourtney Take New York.
Just last week Kardashian celebrated her 30th birthday with several lavish bashes in New York, Las Vegas and Toronto.