Nixdorf may refer to:
Companies Nixdorf Computer AG (1968-1990), a former computer company based in Paderborn, Germany Siemens Nixdorf Informationssysteme (1990-1999), a company formed when Siemens purchased Nixdorf Computer AG Wincor Nixdorf (1999-2016), a German corporation, which succeeded Siemens Nixdorf Informationssysteme, that provides retail and retail banking hardware, software and services Diebold Nixdorf (since 2016), the company after Diebold, Inc.'s acquisition of Wincor Nixdorf.
People Heinz Nixdorf, a German businessman and founder of Nixdorf Computer AG.
Places Nixdorf, the German name for Mikulášovice, a town in the Czech Republic