Peter P. Carr (August 6, 1890 – December 1, 1966) was an American grocer who served three terms as a Republican member of the Wisconsin State Senate from Rock County.
Carr was born in North Jutland County, Denmark on August 6, 1890.
During the Great Depression, Carr was Chairman of the President's Re-Employment Board of Rock County, Wisconsin.
After winning a narrow plurality in a four-way Republican primary election which included former Progressive Assemblyman Stanley Slagg, he was elected in 1954 to the 15th (Rock County) Senate district without opposition in the general election, to succeed fellow Republican Robert Robinson, who had died December 26 of the prior year.
In 1966 he lost the Republican nomination to youthful millionaire Assemblyman George M. Borg, coming in a weak third in a three-way race after the district was drastically changed by a redistricting.