Absecon Mills in Galloway Township was closed when the blaze broke out Sunday night.
Fire Chief Ron Garbutt told The Press of Atlantic City the fire was primarily confined to a loading, shipping and storage area.
Garbutt says fire walls in the building were constructed to prevent flames from spreading.
The cause is under investigation.
Absecon Mills employs about 100 people.
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Information from: The Press of Atlantic City, http://www.pressofatlanticcity.com