Three of the strikes were in Syria and hit land features, denying the Islamic State “tactical advantage,” the military said.
In Iraq, 16 air strikes near Mosul, Ramadi, Bayji, Sinjar, Tal Afar and Fallujah hit units, buildings and fighting positions, the statement said.
The strikes took place on Friday and Saturday.
A group monitoring the conflict said 52 civilians had been killed in a coalition air strike in the northern Syrian province of Aleppo on Friday. The U.S. military said Saturday it could not confirm the civilian deaths but was looking into the allegation.