In September, the state’s City Development Board approved Cedar Rapids’ annexation of 3241 Blairs Ferry Rd. NE. One property, singular.
Screencap via Linn County GIS website
The long driveway in the middle goes to First Assembly of God Church, which owns the property. Hiawatha is on the north side of Blairs Ferry, which put this property between two cities but also made it an unincorporated island.
There’s also a collection of islands/trapped land southwest of the intersection of Edgewood Road NE and 42nd Street NE. Developments between Blairs Ferry Road and IA 100 west of Ushers Ferry Road, as well as undeveloped land south of Xavier High School, aren’t technically islands, just never added to the city.