Flag created by CincyFlags for the neighborhood. 
Its symbolism, according to CincyFlags in [1]:
"Inspired by the Millvale Eagle’s mascot, this dynamic shape conveys the motion and energy of the community.
Two stripes, one for the Beekman Street corridor, and another for the Mill Creek. The design was inspired by the Rec Center’s walls.
Blue and Orange are Millvale’s identifying colors.

White for community action and public spaces."
Own work using: https://www.cincyflags.com/millvale
CincyFlags