Seidenfaden (German for silk thread) may refer to:
- Tøger Seidenfaden (1957-2011), Danish journalist
- Gunnar Seidenfaden (1908-2001), Danish diplomat
- Erik Seidenfaden (ethnologist) (1881–1958), Danish ethnologist
- Erik Seidenfaden (journalist) (1910-1990), Danish journalist
- Seidenfaden, a part of the municipality Wipperfürth in North Rhine-Westphalia, Germany