Twin Tiers
From Wikipedia, the free encyclopedia
The Twin Tiers are the collective counties that lie on the New York–Pennsylvania border on either side of the 42nd parallel north. The region is predominantly rural and contains many small towns.
Twin Tiers | |
|---|---|
Region | |
 Counties in dark green are almost always considered part of the Southern Tier. Counties in dark red indicate the Northern Tier. | |
 | |
| Population | |
• Total | 850,000 |
Separately, the two halves of the Twin Tiers region are known as the Southern Tier region in the state of New York and the Northern Tier region in the Commonwealth of Pennsylvania. The "Northern" and "Southern" designations are relative to the states in which they are located, not relative to each other.
The Twin Tiers region is usually defined as including these counties:
| Northern Tier | Southern Tier |
|---|---|
McKean, Potter, and (less often) Cameron Counties refer to themselves as part of the Twin Tiers, but almost never consider themselves part of the Northern Tier, instead going by the name "Northern Pennsylvania". Significant ambiguity often exists in regions: for instance, the western part of the region (McKean and Potter Counties) often associate themselves with St. Marys, a city larger than any city in that area, but in Elk County, just south of what is considered "Northern Tier" by any standard. This broader area is also known as the Pennsylvania Wilds.
Erie County, Pennsylvania, and Warren County, Pennsylvania, are almost never considered part of the Twin Tiers, though portions of Warren County are occasionally associated with the rest of the region.