Pierre Soulé (August 31, 1801 – March 26, 1870) was a Franco-American attorney, politician, and diplomat during the mid-19th century.
Serving as a United States Senator from Louisiana from 1849 to 1853, he was nominated that year as U.S.
Minister to Spain, a post he held until 1855.
He is likely best known for his role in writing the 1854 Ostend Manifesto, part of an attempt by Southern slaveholders to gain support for the US to annex Cuba to the United States.
Some Southern planters wanted to expand their territory to the Caribbean and into Central America.
The Manifesto was roundly denounced, especially by anti-slavery elements, and Soulé was personally criticized for violating his diplomatic role.
Born and raised in southwest France, Soulé was exiled for revolutionary activities.
He moved to Great Britain and then the United States, where he settled in New Orleans and became an attorney, later entering politics.