Heinrich Wilhelm Ferdinand Halfeld, also known in Portuguese as Henrique Guilherme Fernando Halfeld, (23 February 1797 – 22 November 1873) was a German engineer.
He was born in Clausthal-Zellerfeld, Kingdom of Hanover, and studied at the Bergakademie Clausthal.
He moved to Brazil in 1825, where he lived until his last days.
He is most famous for having planned the development of a part of the inner region of the Brazilian state of Minas Gerais, especially that of the city of Juiz de Fora.