30Luzerne.-Dupont borough incorporated from part of Pittston township, and Pringle borough from Pringle township, since 1910. Marcy township incorporated as Duryea borough between 1900 and 1910.

31 McKean.-Lewis Run borough incorporated from part of Bradford township and part of Bradford township annexed to Bradford city since 1910.

82 Mercer.-Total for 1900 includes population (107) of Bethel borough, annexed to Hickory township between 1900 and 1910. Changes since 1910: Name of Farrell borough changed from South Sharon; Sharon borough incorporated as a city; parts of Hickory township annexed to Farrell borough and Sharon city: South Pymatuning township organized from part of Pymatuning township.

38 Miffiin.-Burnham borough incorporated from part of Derry township, and parts of Derry and Granville townships annexed to Lewistown borough, since 1910.