Fukushima Castle (福島城, Fukushima-jō) was a castle located on the Kiso river in Kiso, Nagano, Japan.

Fukushima Castle was the site of the Siege of Kiso-Fukushima led by Takeda Shingen in 1554.

The castle's commander, Kiso Yoshiyasu [ja] surrendered the garrison when the food supplies ran out.

[1] The castle no longer stands.