Wassaic may refer to:

Places

• Wassaic, New York
• Wassaic (Metro-North station), train station in Wassaic, New York

Ships

• USS Wassaic (ID-3230), a United States Navy cargo ship in commission from 1918 to 1919

• Backbreaker
• Back-breeding
• Back-building thunderstorm
• Back by Midnight
• Backcare
• Back Catalogue
• Backchannel
• Backchannel (disambiguation)
• Back-channeling
• Back-choir
• Back compression
• Back-contamination
• Back contamination
• Backcountry skiing
• Back-Cover Texts
• Back (crater)
• Back Creek (Potomac River tributary)
• Backcronym
• Backcross
• Backcrossing
• Back-crossing
• Back (disambiguation)
• Back door
• Backdoor (computing)
• Back door (disambiguation)