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