The man is described as African-American, 6'0" tall, with a defined scar running down his left cheek.
Investigators say he approached the victim from behind and forced his way into her residence, where he sexually assaulted her around 4:15 a.m. Sunday morning in the 400 block of West Belmont. Anyone with information is asked to call Chicago police.
"It's scary and it has been pretty prevalent lately that there's been some unsafe issues, so it's a scary thing," said Brigid Jennings.
Police say it happened inside an apartment building near Lake Shore Drive. Investigators say that's when a 24-year-old woman says she was pushed into her unit and raped.
"It's pretty scary to me since we do walk alone a lot. I never felt unsafe in our neighborhood before," Erin Marrone said.
The woman was taken to an area hospital for treatment. Meanwhile, some neighborhood residents are taking additional safety precautions, especially those living in buildings without doormen.
I don't let anyone in behind me unless I recognize them," said Catherine Scallen. "Our building's pretty small, so we recognize our neighbors by face."
"Lakeview is a pretty nice community. People generally will look out for one another," Terrance McRae said.