Kimbiji Ruins (Swahili: Magofu ya mji wa kale wa Kimbiji) is a Medieval Swahili, National Historic Site located in Kimbiji ward of Kigamboni District in Dar es Salaam Region of Tanzania.

There are stone ruins there with a lot of indigenous and foreign pottery on the surface.

The land around the mosque is a cemetery, and the majority of the burials contain large fragments of European objects from the 18th and 19th centuries that were utilized in religious acts.

Local potsherds were found in great quantity in a shovel test trench dug at the location, which was filled to a depth of 80 cm with them.

The site may have been inhabited continuously for a very long time, according to finds from the deposits.