The suspect is identified 40-year-old Tyrone Rosario.
Investigators said the suspect approached the elderly victims, engaged in conversation with them, physically assaulted the victims, removed their personal property, and fled on foot.
Police say Rosario is 5'5", 120 lbs.
The robberies date happened between April 23 and May 9.
All of the victims were women between 65 and 81 years old.
Anyone with information is asked to call Crime Stoppers at (800) 577-TIPS (8477). You can also submit tips by logging onto Crime Stoppers' website at www.nypdcrimestoppers.com or by texting tips to CRIMES (274637), then enter TIP577.
All calls are strictly confidential.