Pier is a surname, and may refer to:
Caroline Hamilton Pier (1870–1938), American lawyer Edward Pier (1807–1877), American businessman and politician from Wisconsin Ford Pier (born 1970), Canadian singer-songwriter Harriet Hamilton Pier (1872–1943), American lawyer Jean-Paul Pier (1933–2016), Luxembourgish mathematician Kate Pier (1845–1925), American court commissioner, mother of Caroline, Harriet and Kate Hamilton Pier Kate Hamilton Pier (1868–1931), American lawyer Róber Pier (born 1995), Spanish footballer
See also St Pier (surname) Pieri (surname)