Robin moves to Keystone City during the last few months of her pregnancy, but he returns to her when she is giving birth.

He became the hero-in-residence of Keystone City after the Flash retired in 1950.

After some time, Axel escaped from prison and returned to Keystone City.

She was visiting her mother in Keystone City at the time, so she went to the police lab to meet him.

A competition which put all Keystone City in danger.

Unaware of this, the Shade returned to America and to Keystone City.

The battle ends up outside of Keystone City.

The new Sonar first appears in Keystone City to test his new powers.

Keystone City first appeared in the 1940s in the original Flash Comics series.

Keystone City is briefly mentioned in the 6th episode of the tv series "Arrow".