| Birth Name: | Peter John Koutoujian Jr. |
| Birth Date: | 17 September 1961 |
| Birth Place: | Newton, Massachusetts |
| Occupation: | Sheriff Attorney Politician Professor |
| Residence: | Waltham, Massachusetts |
| Party: | Democratic |
| Spouse: | Elizabeth Cerda |
| Alma Mater: | Bridgewater State College New England School of Law Harvard University |
| Title1: | Sheriff of Middlesex County |
| Term Start1: | January 14, 2011 |
| Predecessor1: | John Granara |
| Title2: | Member of the Massachusetts House of Representatives from the 10th Middlesex district |
| Term Start2: | 1997 |
| Term End2: | January 14, 2011 |
| Predecessor2: | Anthony Mandile |
| Successor2: | John J. Lawn |
Peter John Koutoujian (born September 17, 1961)[1] is an American politician who is the current Sheriff of Middlesex County, Massachusetts and a former member of the Massachusetts House of Representatives.
Koutoujian is of Armenian ancestry.[2] In 2003, Koutoujian was named a Rappaport Urban Scholar by the Rappaport Institute for Greater Boston.[3]
A former Assistant District Attorney in Middlesex County, Koutoujian was elected to the Massachusetts House of Representatives in 1996.[4] From 2001–2005, he was a member of Joint Committee on Health Care and was the chairman of the Committee from 2003–2005. From 2005–2009, he was the Chair of the Joint Committee on Public Health. From 2009 until his departure from the House, he was the Chair of Joint Committee on Financial Services.[5]
On January 14, 2011, Koutoujian was appointed by Governor Deval Patrick to fill the term of Middlesex County Sheriff James DiPaola, who died on November 26, 2010.
See main article: 2013 Massachusetts's 5th congressional district special election. Koutoujian was a candidate for the Democratic nomination in the 2013 special election for the U.S. House of Representatives. He ran to succeed Ed Markey as the U.S. representative for Massachusetts's 5th district.[6] He finished second in the Democratic primary.