Newest reservoirs in Pennsylvania
The year that a reservoir was first filled to the reservoir’s normal elevation – or the year that a natural lake was first dammed – is the determining factor in the age of the body of water. A large reservoir can take more than a year to fill after its dam is first closed. You can find many of the the world’s newest reservoirs on LakeLubbers in the comparison table below. Many of the world’s oldest reservoirs appear on the last page of that list. Note: For some lakes, the completion year data is unknown, so you may see fewer lakes than the total 40 articles we have published for Pennsylvania lakes.Thinking about booking a Pennsylvania lake vacation home rental, cabin or hotel?
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Below are lakes within USA > US Mid-Atlantic Region > Pennsylvania > Compared by newest (youngest) reservoirs and the year it was completed. This list does not represent all lakes in Pennsylvania, only the 40 Pennsylvania lake articles we have published on the LakeLubbers website.
Lake name  |
Completion year |
Lake description |
|---|---|---|
| Cowanesque Lake, PA (Pennsylvania, Pennsylvania Wilds Region, US Mid-Atlantic Region, USA) |
1990 | Peacefully nestled between forested ridges in north central Pennsylvania lies Cowanesque Lake. Located near the New York state line, the name Cowanesq… |
| Beaverdam Reservoir (Allegheny Mountains & Valleys Region, PA, Pennsylvania, US Mid-Atlantic Region, USA) |
1974 | Also known as Beaverdam Run Reservoir Tucked away in rural Cambria County, in Pennsylvania’s Allegheny Mountains and Valleys region, Beaverdam Reservoir provides a welcome natural respite… |
| Raystown Lake, PA (Allegheny Mountains & Valleys Region, PA, Pennsylvania, US Mid-Atlantic Region, USA) |
1973 | Raystown Lake, at 8,300 acres, is the largest lake located entirely within Pennsylvania’s borders. The lake is nestled in the southern Allegheny Mount… |
| Lake Nockamixon, PA (Pennsylvania, Philadelphia & Countryside Region, PA, US Mid-Atlantic Region, USA) |
1973 | Lake Nockamixon, located in the 5,283 acre Nockamixon State Park, is located in southeastern Pennsylvania’s Bucks County. The 1,450 acre reservoir is… |
| Lake Wilhelm, PA (Great Lakes Region, PA, Pennsylvania, US Mid-Atlantic Region, USA) |
1971 | Lake Wilhelm was created in 1971 with the damming of Sandy Creek for flood control purposes. Lake Wilhelm is a shallow lake with a maximum depth of ab… |
| Beltzville Lake, PA (Northeastern Mountains Region, PA, Pennsylvania, US Mid-Atlantic Region, USA) |
1971 | Also known as Beltzville Reservoir The Pennsylvania Pocono Mountains are spectacular for many reasons, and Beltzville Lake is one of them. Located in the southern foothills of these fam… |
| Arrowhead Lake, PA (Northeastern Mountains Region, PA, Pennsylvania, US Mid-Atlantic Region, USA) |
1970 | Tucked away in the beautiful Pocono Mountains, Arrowhead Lake is a private gated community in the Northeastern Mountains region of Pennsylvania. Loads… |
| Lake Marburg (Pennsylvania, Pennsylvania Dutch Country Region, US Mid-Atlantic Region, USA) |
1970 | Also known as Codorus Lake Pennsylvania Dutch Country near Hanover, Pennsylvania holds a spectacular recreational resource called Lake Marburg. This 1,300-acre reservoir combine… |
| Lake Arthur, PA (Pennsylvania, Pittsburgh & Countryside Region, PA, US Mid-Atlantic Region, USA) |
1970 | In the warm summer breeze, sailboats dart like flocks of colorful birds across Lake Arthur’s clear Pennsylvania waters. Located in Butler County, this… |
| Allegheny Reservoir, NY/PA (Chautauqua-Allegheny Region, NY, New York, Pennsylvania, Pennsylvania Wilds Region, US Mid-Atlantic Region, USA) |
1965 | Also known as Kinzua Dam Lake, Kinzua Lake, Lake Kinzua Flowing across tree-covered hills in northwestern Pennsylvania and southwestern New York, the Allegheny Reservoir’s 12,080 acres provide an open invit… |
| Lake Heritage (Pennsylvania, Pennsylvania Dutch Country Region, US Mid-Atlantic Region, USA) |
1965 | One of Pennsylvania Dutch Country’s best residential neighborhoods is Lake Heritage, a gated community built around the shores of a 154-acre, private… |
| Shenango River Lake, PA/OH (Great Lakes Region, PA, Northeast Ohio, Ohio, Pennsylvania, US Mid-Atlantic Region, US Midwest Region, USA) |
1965 | Also known as Shenango Reservoir Located mostly in northwestern Pennsylvania between Greenville PA and Sharon PA – and spilling into northeastern Ohio – Shenango River Lake provides f… |