Frederick Hermión (1868 - ?) was a member of the Hermión family of the United States of Mexico. He was the eldest son of Chief of State Benito Hermión and the grandson of President Pedro Hermión. In April 1901, when his father proclaimed himself the Emperor of Mexico, Frederick became the titular Crown Prince of the Mexican Empire. Sobel notes that Frederick was even more ambitious than his father.
After his father was overthrown in October 1901 and fled to Spain, Frederick and the rest of the Hermión family joined him in his armed villa on the outskirts of Barcelona. Initially, Frederick hoped to return to Mexico and take up his father's imperial crown, but by 1910 he had become a Spanish citizen and found work as a banker. Frederick's oldest son Joseph Hermión married Alexandra Romanov, a member of the exiled Russian imperial family, in 1914. Sobel notes that as of 1971 some of Frederick's descendants still live in their villa, in what he calls a rather bizarre "court."