County Total: 45,637   (*) not a city in its entirety, but includes a non-coextensive city that encompasses a significant percentage of the town's overall population. County Total: 47,550   (*) not a city in its entirety, but includes a non-coextensive city that encompasses a significant percentage of the town's overall population. County Total: 51,388   County Total: 55,999   County Total: 67,332   County Total: 88,865   County Total: 115,018   County Total: 129,017   County Total: 143,196   County Total: 155,071   As of 1900, Middlesex County contained one borough and one non-coextensive city:   The city of Middletown became coextensive with its parent town in 1923.  1900   1910   1920   1930   1940   1950   1960   1970   1980   1990   2000   1970 Census  The Census Bureau made a number of revisions to 1970 census totals subsequent to their initial release. The 1970 total for Middlesex County was originally reported as 114,816; and for the town of East Hampton, 4,474. The totals were later revised to those shown in the list above.  2000 Census  The Census Bureau made a number of revisions to 2000 census totals subsequent to their initial release. The 2000 total for the city of Middletown was originally reported as 43,167; and for the town of East Hampton, 13,352. The totals were later revised to those shown in the list above. This was apparently done to correct assignment errors between these municipalities; the collective population of the two is the same using either set of figures, so the county total was not affected.