| Peter B. Porter Jr. | |
| Office: | Speaker of the House New York Assembly |
| Term Start: | January l, 1841 |
| Term End: | December 31, 1841 |
| Preceded: | George Washington Patterson |
| Succeeded: | Levi S. Chatfield |
| Office2: | Assemblyman New York Assembly |
| Term Start2: | January l, 1838 |
| Term End2: | December 31, 1841 |
| Preceded2: | Hiram McNeil |
| Succeeded2: | Thomas T. Flagler |
| Birth Date: | 7 May 1806 |
| Death Date: | 1871 |
| Parents: | Augustus Porter Jane Howell |
| Relations: | Peter Buell Porter (uncle) |
| Profession: | Lawyer, politician |
| Party: | Whig |
| Alma Mater: | Hamilton College |
Peter Buell Porter (May 7, 1806 – 1871) was an American lawyer and politician from New York. He was Assemblyman and Speaker of the New York State Assembly in 1841.
Peter Buell Porter was born on May 7, 1806, in Salisbury, Connecticut, to Augustus Porter (1769–1849), and his second wife Jane Howell.[1] His uncle, and namesake, was Peter Buell Porter (1773–1844), the United States Secretary of War under John Quincy Adams. Shortly after his birth in June 1806, Porter moved with his family to Niagara Falls, New York. He graduated from Hamilton College. Then he studied law, was admitted to the bar and practiced in Buffalo, New York.
Porter died in 1871.
Elected as a Whig, Porter was a member from Niagara County of the New York State Assembly from January 1, 1838, to December 31, 1841, and was Speaker in 1841. In 1852, he was a vice president of the committee that organized the celebration of the anniversary of the Battle of Lundy's Lane, and was a director of the Buffalo and Niagara Falls Railroad.