USDP
The abbreviation USDP stands for:
- Ukrajinska Sozial-Demokratichna Partija - Ukrainian Social-Democratic Party
- Independent Social Democratic Party of Germany - A splinter group of the SPD that later merged into the KPD , mostly abbreviated to USPD
- Union Solidarity and Development Party - The ruling party in Myanmar, backed by the military junta and presiding over President Thein Sein
- United States Democratic Party, the American Democratic Party (United States)
- United States Disclosure Policy
- Abbreviated often Unified Software Development Process, a software engineering methodology, Unified Process called