Alfonso Crespo, 6th Count of Castillo Fiel, (in full, Spanish: Don Alfonso Crespo de Gálvez y Martín-Romero Godoy, sexto conde de Castillo Fiel), (18 February 1873 – ?), was a Spanish nobleman. Crespo was born in Málaga, the son of don Eduardo Antonio Crespo y Gálvez del Postigo, and of María Martín-Romero y Godoy di Bassano, 5th Countess of Castillo Fiel. He succeeded to his mother titles in 1904, and was given the Coat of Arms of Tudó by Royal Order of 29 October 1906. He was Governor of Ávila, Gentleman of the Chamber of HM with exercise and Grand Cross of the Order of Agricultural Merit.