Northern Tier may refer to:

• Northern Tier (Pennsylvania), five northern counties in Pennsylvania
• Northern Tier (United States), the northernmost confine of the lower 48 United States
• Northern Tier (Scouting), high adventure bases run by Scouting America
• Northern Tier Energy, an American business partnership created in 2010
• Northern Tier, a Cold War term from 1955–1979 for the four Middle Eastern members of the Baghdad Pact, also known as the Central Treaty Organization: Turkey, Iraq, Iran and Pakistan.

This disambiguation page lists articles associated with the title Northern Tier.
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