| Pehr Gustaf Holmes | |
| State: | Massachusetts |
| District: | 4th |
| Term Start: | March 4, 1931 |
| Term End: | January 3, 1947 |
| Succeeded: | Harold Donohue |
| Office2: | Member of the Massachusetts Executive Council 7th Councilor District |
| Term Start2: | 1925 |
| Term End2: | 1928 |
| Term Start3: | January 1, 1917 |
| Term End3: | January 5, 1920 |
| Successor3: | Peter F. Sullivan |
| Office4: | Member of the Worcester, Massachusetts Board of Aldermen |
| Office5: | Member of the Worcester, Massachusetts Common Council Ward 6 |
| Birth Date: | 9 April 1881 |
| Birth Place: | Forshaga Municipality, Värmland, Sweden. |
| Party: | Republican |
| Children: | G. Everett Holmes |
| Residence: | 27 Holden Street, Worcester, Massachusetts |
| Occupation: | Manufacturer |
Pehr Gustaf Holmes (April 9, 1881 - December 19, 1952) was a United States representative from Massachusetts.
Holmes was born in Mölnbacka in Forshaga Municipality in Värmland, Sweden. In 1886, when he was 4 years old, Holmes immigrated to the United States with his parents, who settled in Worcester, Massachusetts.
Holmes attended the Millbury Street School public school until he was 14.
When he turned 14 Holmes left school and went to work for the Reed and Prince Manufacturing Co. of Worcester where he "tended machines". Holmes also worked at the Brunell Electroplating plant, where he learned the business of Electroplating. In 1909 Holmes established his own Electroplating firm, the Holmes Electrotype Foundry.
Holmes also engaged in the banking and insurance business.
Holmes was elected member of the Worcester Common Council from Ward 6. In 1913 Holmes became a member of the Worcester Board of Aldermen, serving as its president.
Holmes was inaugurated mayor of Worcester on January 1, 1917, he served as mayor until January 5, 1920.
Holmes served as a member of the Massachusetts Executive Council, Seventh Councilor district from 1925 to 1928.
Holmes was elected as a Republican to the 72nd United States Congress and to the seven succeeding Congresses from (March 4, 1931 – January 3, 1947). Holmes was an unsuccessful candidate for reelection in 1946 to the 80th United States Congress.
Holmes returned to Worcester and his electrotype business. Holmes died in Venice, Florida; his interment was in the Old Swedish Cemetery in Worcester.