Investigators released video of the man in his 30's wearing a knit hat, khaki pants and black Nike sneakers with a white swoosh.
Police say one of the sex assaults happened on the 300 block of South 21st Street on October 17 in Center City.
He has been seen around Rittenhouse Square and along Kelly Drive in Fairmount Park.
The Action News Data Journalism Team found there have been at least five other sexual assaults this year near where the last case happened on South 21st Street.
"I love Philadelphia it's a great city. I love living here. You do have to be aware of your surroundings at all times as a woman and it's not really fair," said Amy Dipasquale of Philadelphia.
If you recognize the suspect, please call police.