There are 194 Catholic Diocese in the United States. See the related links for a wikipedia listing of all the provinces and diocese.
http://en.wikipedia.org/wiki/List_of_the_Catholic_dioceses_of_the_United_States
Roman Catholic Diocese of Kisantu was created in 1931.
The area of Roman Catholic Diocese of Inongo is 100,000 square kilometers.
Catholic diocese of Lansing.
Syro-Malabar Catholic Diocese of Palai was created in 1950.
Roman Catholic Diocese of Châlons was created in 1822.
Roman Catholic Diocese of Łomża was created in 1798.
Roman Catholic Diocese of Łomża's population is 573,647.
Roman Catholic Diocese of Görlitz was created in 1994.
Roman Catholic Diocese of Huacho was created in 1958.
Roman Catholic Diocese of Huacho's population is 482,000.
Roman Catholic Diocese of Sandhurst's population is 341,850.
Roman Catholic Diocese of Kaišiadorys was created in 1926.