In addition the following four towns were considered as separate boroughs.

Fairbanks, unlike other larger cities in Alaska, still has a separate borough and city.

The suburb has fairly well-defined boundaries, having been a separate borough from 1875 until the time of local government restructuring in 1989.

It did not include Louth, which was a separate municipal borough entirely surrounded by the rural district.

The district did not include the town of Tewkesbury which was a separate municipal borough.

It was named after but did not include Aylesbury, which was a separate municipal borough.

Later, efforts to establish a separate borough of Ocean Grove were attempted many times.

It was incorporated as a separate borough in 1868 with an area of about a square mile and a population of roughly 400.

Up to 22 October 2009 it was a separate borough of Mönchengladbach.

Under this name, the area was a separate borough for many years from 1877 until amalgamation with the city of Dunedin in 1963.