Lenín Boltaire Moreno Garcés (Spanish: [leˈnim bolˈtajɾe moˈɾeno ɣaɾˈses]; born 19 March 1953) is an Ecuadorian politician who served as the 46th president of Ecuador from 2017 to 2021. He was also vice president from 2007 to 2013, serving under President Rafael Correa.

He was nominated as the candidate for Correa's PAIS Alliance, a social democratic political party, in the 2017 presidential election and won a narrow victory in Ecuador's second round of voting on 2 April 2017. However, after his election Moreno drastically shifted his political stance, distancing himself from Correa's leftist legacy in both domestic and foreign policy. By the end of Moreno's presidency he had left office with a staggeringly low approval rating of 9%, the lowest in modern Ecuadorian history. He was expelled from PAIS Alliance in March 2021 after the party's crushing defeat in the 2021 elections.

Moreno was shot in a 1998 robbery attempt and thereafter has used a wheelchair. For his advocacy for people with disabilities, he was nominated for the 2012 Nobel Peace Prize. According to The New York Times, while he was in office from 2017 to 2021, Moreno was the world's only serving head of state to use a wheelchair.

Lenín Moreno was born into a middle-class family in Nuevo Rocafuerte, a small town in the Ecuadorian Amazon, near the Peruvian border. His father, Servio Tulio Moreno, was a teacher who promoted bilingual education and integrated schools for indigenous children and mestizo children and who later became a senator. His parents named him after men they admired; his father liked Vladimir Lenin and his mother Voltaire, although an error in the civil registration turned his middle name into Boltaire (in Spanish the letters v and b correspond to the same phoneme). He moved to Quito with his family when he was three years old.

Moreno studied in Quito at the Instituto Nacional Mejía (Mejia National Institute), the Colegio Nacional Sebastián Benalcázar (Sebastian Benalcazar National School), and the Universidad Central del Ecuador (Central University of Ecuador), where he earned a degree in Public Administration and was honored as the best graduate. He studied psychology.

Moreno began his career in 1976 as the director of the Continental Professional Training Center. He went on to become Director of OMC Publigerencia Andina, sales manager of Satho and marketing manager of Zitro, all located in Ecuador. Then he moved to the public sector, taking an administrative post with the Minister of Government. He worked extensively in the public tourism industry. He founded the Chamber of Tourism of Pichincha, a province in Ecuador, and was executive director of the National Federation of Tourism Chambers and executive director of the Chamber of Tourism of Pichincha, between 1997 and 1999.

Lenin Moreno, before becoming president, established a foundation called the "Eventa Foundation" to promote his "theory of humor," which, according to Lenin Moreno himself, focused on the importance of humor, laughter, and kindness to foster a positive change in people's attitudes and behavior. He even wrote seven books on the subject:

Filosofía para la Vida y el Trabajo ("Philosophy for life and work"), Teoría y Práctica del Humor ("Theory and Practice of Comedy"), Ser Feliz es Fácil y Divertido ("Being Happy is Easy and Fun"), Los Mejores Chistes del Mundo ("World's Best Jokes"), Humor de los Famosos ("Humor of the Famous"), Trompabulario, Ríase, no sea enfermo ("Laugh, don’t be sick") and Cuentos no Ecológicos ("Non-Ecological Tales").