Baldwin van Lannoy, Lord of Molembais, nicknamed "Le Bègue" (The Stutterer; 1388 in Hénin-Beaumont – 1474 in Huppaye) was a Flemish statesman, and ambassador for Philip the Good at the court of Henry V of England.
He was a member of the noble de Lannoy family.
He was a son of Guilbert I of Lannoy and Catherine de Saint-Aubin, Lady of Molembais.
He married twice; first to Marie, Lady of Melles and 2nd to Adrienne de Berlaymont, who gave him 4 children: During his career he was named Governor of Lille.
When Baldwin became Knight in the Order of the Golden Fleece, he commissioned a portrait to be painted by Jan van Eyck.