The Social Democratic Party of South Tyrol (German: Sozialdemokratische Partei Südtirols, SPS) was a regionalist social-democratic and Christian-social party of German speakers in South Tyrol, Italy, that was active from 1972 to 1983.
The SPS gathered politicians of diverse ideological provenance, including the former Communist Party of Italy member Silvio Flor junior.
Most of its members were organised in or close to the Autonomous South Tyrolean Federation of Trade Unions (ASGB).
[1] In the 1972 general election Dietl was the candidate of the hard-liners, including the Party of Independents, in the single-seat constituency of Brixen and won 20.8 percent of the vote, the major defection from the SVP since then.
SPS obtained its best result in 1973, when it won 5.1% of the votes and got two provincial deputies elected (Hans Dietl, who left the party soon after, and Wilhelm Erschbaumer).