The reward was announced at a press conference Wednesday in Atlantic City as officers continued searching for Nadirah Ruffin.
Police said they had made no arrests, but had several 'persons of interest.'
At the news conference police urged anyone to contact them, even if they don't think the information is important.
"We can put things together and investigators can build a story and maybe interview some people," said Sgt. Monica McMenamin of the Atlantic City Police Department.
Ruffin has been missing since the incident at her cousin's house in the 800 block of N. Maryland Avenue.
Police say it was around 11:30 p.m. when four armed suspects, wearing masks and hooded sweatshirts, stormed the house.
Witnesses told Ruffin's mother that the intruders tied up everyone in the home and forced Ruffin out of the home and into an unknown vehicle.
They also told her that Ruffin may have recognized one of the intruders as she pleaded to be let go.
Police described Ruffin as a black female with a medium complexion, 5'4" in height, about 120 pounds, long brown colored braids and eyeglasses.
Police said Ruffin also has several tattoos including "so sweet," which is on the left side of her neck.
Ruffin was last seen wearing a blue Polo sweater, white T-shirt and blue jeans.
Ruffin is the mother of a 4-year-old boy.
Her family says Ruffin is originally from Atlantic City, but moved to Egg Harbor Township a few months ago. She graduated from Atlantic City High in 2009 and works at the Polo store in the city while she takes classes at Atlantic Cape Community College.
Anyone with information about the incident or Ruffin is asked to call the Atlantic City Police Department Detective Bureau at 609-347-5766 or Atlantic County Prosecutor's Office/Crime Stoppers at 800-658-8477 (TIPS) or 609-652-1234.
Tips can also be submitted through the website for Atlantic County Crimestoppers