United States Climate Alliance
- Country: United States
- Type: Organization
- Website: www.usclimatealliance.org
- Update: 05-02
The United States Climate Alliance (USCA) is a U.S. environmental organization founded in June 2017 following President Donald Trump's announcement of his withdrawal from the Paris Agreement, with a membership that includes some U.S. states and unincorporated self-governing territories, to reach the U.S. goals within the Paris Agreement to reduce U.S. carbon emissions.