Timothy Shannon pleaded no contest last month in Oceana County Circuit Court to second-degree murder in the Dec. 29 death of Lee-Ann Shannon, 34.
A no-contest plea isn't an admission of guilt, but it is treated as such for sentencing, which was held Monday.
Judge Terrence Thomas issued a sentence of 13 1/2 to 75 years. Thomas said it'll be up to the Corrections Department to decide when Shannon is released from prison.
Shannon told police his wife accidentally drowned, and he tried to revive her.
He was a Hart city councilman at the time of her death.