Prior to the 1800s the city developed along the Delaware River, leaving the area around Logan Square as untouched forest through the American Revolution.
Over the next quarter century the square served as a pasture, execution grounds, and graveyard, and hosted a gallows until the hanging of William Gross in 1823.
With aims of redirecting public attention away from its previous morbid use, Philadelphia leased the square to the Orphans' Society from 1821 to 1830.

In 1842 an ordinance “made it an offense to drive or take into Logan, Penn, or Rittenhouse squares any ‘horse, cow, cart, wagon, carriage or wheelbarrow, except by permission, or place any wood, coal, rubbish, carrion, or offensive matter within either [sic] of the squares, or to climb on the trees, fences or gates . . .
or to dig up the soil or injure the grass, or to run or walk over or lie on the same.
’”By the 1840s Philadelphia had begun a restoration of the square from its former days as a graveyard, lining the walks with trees, planting greenery and shrubbery, and constructing a wooden fence allowing the square to resemble Penn's vision of an urban green space.
During this period, the city limited access to Logan Square to homeowners with property connected to the square who paid for its upkeep; the city constructed a wrought iron fence around the square in 1852.

In 1864 the square was the site of the Great Sanitary Fair, a fundraising event in support of the United States Sanitary Commission to help raise money, support, and buy medicine for the Union troops during the American Civil War.
President Abraham Lincoln visited the fair and donated forty-eight signed copies of the Emancipation Proclamation, which sold for $10 each.
In 1881 the Pennsylvania Railroad constructed a viaduct that disconnected Logan Square and Rittenhouse Square, altering William Penn’s original plan of connectivity between the city's five squares.
Before the 20th century the square was also used as a location for concerts and other community events.

Since the 1890s the city had envisioned constructing of a boulevard similar to the Parisian Champs-Élyséese and in 1907 the plans were approved.
The square began to transform again: the original bounds of the square—18th Street to the East, 20th Street to the West, Race Street to the South and Vine Street to the North remain intact, and the square began to more closely resemble its appearance today, distinguished by its circle.
Construction began in 1917 on a plan to connect Center City with Fairmount Park which later became a segment of Benjamin Franklin Parkway.
It was designed by Jacques Gréber, a French landscape architect who converted Logan Square into a circle similar to the oval of the Place de la Concorde in Paris.
Philadelphia even modeled its Free Library and Family Court Building after the twin buildings of the Hôtel de Crillon and the Hôtel de la Marine in Paris.

Among the sites in its immediate vicinity are the Swann Memorial Fountain at the center of the circle, Parkway Central Library, the former Philadelphia Family Court Building, the Academy of Natural Sciences, the Franklin Institute, Moore College of Art and Design, the Roman Catholic Cathedral-Basilica of Sts.
Peter and Paul, and the Mormon Philadelphia Pennsylvania Temple.

The circle itself is the subject of the local band The Wonder Years' song 'Logan Circle' from their studio album The Upsides.
Prior to the 1800s the city developed along the Delaware River, leaving the area around Logan Square as untouched forest through the American Revolution. Over the next quarter century the square served as a pasture, execution grounds, and graveyard, and hosted a gallows until the hanging of William Gross in 1823. With aims of redirecting public attention away from its previous morbid use, Philadelphia leased the square to the Orphans' Society from 1821 to 1830. 
In 1842 an ordinance “made it an offense to drive or take into Logan, Penn, or Rittenhouse squares any ‘horse, cow, cart, wagon, carriage or wheelbarrow, except by permission, or place any wood, coal, rubbish, carrion, or offensive matter within either [sic] of the squares, or to climb on the trees, fences or gates . . . or to dig up the soil or injure the grass, or to run or walk over or lie on the same.’”By the 1840s Philadelphia had begun a restoration of the square from its former days as a graveyard, lining the walks with trees, planting greenery and shrubbery, and constructing a wooden fence allowing the square to resemble Penn's vision of an urban green space. During this period, the city limited access to Logan Square to homeowners with property connected to the square who paid for its upkeep; the city constructed a wrought iron fence around the square in 1852.
In 1864 the square was the site of the Great Sanitary Fair, a fundraising event in support of the United States Sanitary Commission to help raise money, support, and buy medicine for the Union troops during the American Civil War. President Abraham Lincoln visited the fair and donated forty-eight signed copies of the Emancipation Proclamation, which sold for $10 each. In 1881 the Pennsylvania Railroad constructed a viaduct that disconnected Logan Square and Rittenhouse Square, altering William Penn’s original plan of connectivity between the city's five squares. Before the 20th century the square was also used as a location for concerts and other community events.
Since the 1890s the city had envisioned constructing of a boulevard similar to the Parisian Champs-Élyséese and in 1907 the plans were approved. The square began to transform again: the original bounds of the square—18th Street to the East, 20th Street to the West, Race Street to the South and Vine Street to the North remain intact, and the square began to more closely resemble its appearance today, distinguished by its circle. Construction began in 1917 on a plan to connect Center City with Fairmount Park which later became a segment of Benjamin Franklin Parkway. It was designed by Jacques Gréber, a French landscape architect who converted Logan Square into a circle similar to the oval of the Place de la Concorde in Paris. Philadelphia even modeled its Free Library and Family Court Building after the twin buildings of the Hôtel de Crillon and the Hôtel de la Marine in Paris.
Among the sites in its immediate vicinity are the Swann Memorial Fountain at the center of the circle, Parkway Central Library, the former Philadelphia Family Court Building, the Academy of Natural Sciences, the Franklin Institute, Moore College of Art and Design, the Roman Catholic Cathedral-Basilica of Sts. Peter and Paul, and the Mormon Philadelphia Pennsylvania Temple.
The circle itself is the subject of the local band The Wonder Years' song 'Logan Circle' from their studio album The Upsides.
Logan Circle (Philadelphia)