| State: | Maine |
| District: | 1st |
| Predecessor: | Stanley Tupper |
| Successor: | David Emery |
| Birth Name: | Peter Nicholas Kyros |
| Birth Date: | 11 July 1925 |
| Birth Place: | Portland, Maine, U.S. |
| Death Place: | Washington, D.C., U.S. |
| Party: | Democratic |
| Term Start: | January 3, 1967 |
| Term End: | January 3, 1975 |
| Education: | United States Naval Academy (BS) Harvard University (LLB) |
| Serviceyears: | 1944–1953 |
Peter Nicholas Kyros (July 11, 1925 – July 10, 2012) was an American attorney, politician, and lobbyist who served as a Democratic U.S. representative from Maine from 1967 to 1975.
Born in Portland, Maine, to Greek immigrants, Kyros attended the Portland Public Schools completed an engineering program at the Massachusetts Institute of Technology. He earned a bachelor's degree from the United States Naval Academy in 1947 and a law degree from Harvard Law School in 1957.
Kyros served in the United States Navy from 1944 to 1953 and was discharged with rank of lieutenant. He was admitted to the bar in 1957 and commenced the practice of law in Portland, Maine. From 1957 to 1959, Kyros served as counsel to the Maine Public Utilities Commission.
Kyros was elected as a Democrat to the Ninetieth and to the three succeeding Congresses (January 3, 1967 – January 3, 1975). He was an unsuccessful candidate for reelection in 1974 to the Ninety-fourth Congress, narrowly losing to Republican nominee David Emery, and tried unsuccessfully to regain the seat in 1976.[1]
He served in the United States Department of State from 1980 to 1982.
Kyros resumed the practice of law in Washington, D.C., lobbying "for several firms active on Capitol Hill, advocating for scientific and medical research".[1]
Kyros died on July 10, 2012.[2]