There are several lakes named Mud Lake within the U.S. state of Iowa.
Mud Lake is a lake on the Clay-Palo Alto County line. 43°11′21″N 94°54′54″W / 43.18917°N 94.91500°W
Mud Lake is a lake in southeastern corner of Clay County. 42°55′52″N 94°55′54″W / 42.93111°N 94.93167°W
Mud Lake is a bay along the Mississippi River in Peru Township of Dubuque County. 42°36′46″N 90°42′09″W / 42.61278°N 90.70250°W
Mud Lake is a lake in Monroe Township of Linn County.42°03′57″N 91°46′26″W / 42.06583°N 91.77389°W