The gaming company won't say how many are being laid off.
The Press of Atlantic City reports employment figures compiled by the New Jersey Casino Control Commission show there were hundreds of job cuts at Bally's and Caesars.
Employment figures show the four properties had 16,034 workers in September.
Harrah's blames a weak economy, competition from slot parlors in Pennsylvania and New York, and the city's recent smoking ban.
The City Council on Monday voted to postpone the ban for at least a year beginning Nov. 16.
Information from: The Press of Atlantic City