Robert Loudan (fl. 1855 – 1895) was a prominent London woodcut engraver active in the middle part of the 19th century. Most of Loudan's work is associated with the Illustrated London News. His most prominent engravings were woodcuts based upon Thomas Sulman's dramatic balloon bird's-eye views of English and American cities. Considering the prominence of his work, it is surprising just how little biographical information exists. We know almost nothing of Loudan's life, education, or character.