Uppland Runic Inscription 100 is the Rundata designation for a memorial runestone that is located in the forest where a path meets a bog near Skälby, which is about two kilometers northeast of Sollentuna, Stockholm County, Sweden, which was part of the historical province of Uppland.

This runestone, which is made of granite and is 2.1 meters in height, has an inscription which consists of runic text within serpent bands and a Christian cross.

This runestone style is characterized by slim and stylized animals that are interwoven into tight patterns.

The animal heads are typically seen in profile with slender almond-shaped eyes and upwardly curled appendages on the noses and the necks.

[2] Transliteration of runic text into Latin letters: Old Norse transcription: English translation: