Ludendorff is a surname. Notable persons with that name include:

• Erich Ludendorff (1865–1937), German general

• Hans Ludendorff (1873–1941), German astronomer

• Mathilde Ludendorff (1877–1966), German teacher and psychiatrist

See also

• Ludendorff Bridge, a former railway bridge across the Rhine in Germany, named after Erich Ludendorff

• Ludendorff, the former German name of the Prussian village Kruszewnia, now in Poland