The Nikon D100 is a discontinued 6-megapixel digital single-lens reflex camera made by Nikon Corporation and designed as a consumer alternative to the professional D1 series cameras.

It was introduced on February 21, 2002 at the Photo Marketing Association Annual Convention and Trade Show as a direct competitor to the Canon EOS D60.

With a price of US$1,999 for the body only in the United States, it was the second 6-megapixel DSLR to break the $2000 barrier, after the EOS D60.

The price of the camera dropped over time to $1699 in May 2003, and $1499 in December 2003.

In the Spring of 2004 Nikon released the D70, which offered superior features to the D100 at a lower price of $999.