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 Ebba Merete Seidenfaden (1940-1980), better known as Snu Abecassis, Danish-born Portuguese publisher Seidenfaden, a part of the municipality Wipperfürth in North Rhine-Westphalia, Germany