About 150 fishermen were rescued from a big ice floe in Lake Erie on Saturday after it broke off from the shore.
A Coast Guard spokesman said one person fell through the ice and died on the way to a hospital.
Another man who fell through the ice was not injured.
Boats and helicopters were used by the Coast Guard in a four hour operation.
The Ottawa County Sheriff's Department said the ice broke shortly after 10:30 am EST.
The Coast Guard says the slab of ice was about 13km wide.
The BBC reports ice on Lake Erie has been described as particularly thick this winter.