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Seneca, Illinois
Seneca is a village in LaSalle and Grundy counties in the U.S. state of Illinois. The population was 2,353 at the 2020 census, down from 2,371 at the 2010 census.
The LaSalle County portion of Seneca is part of the Ottawa, IL Micropolitan Statistical Area, while the small portion that lies in Grundy County is part of the Chicago metropolitan area.
A French missionary by the name of Father Gabriel de la Ribourde brought Catholicism to the Seneca area 175 years before St. Patrick's Parish was founded. In 1680, he was traveling with an exploratory party from Quebec when he was ambushed and killed by a band of Kickapoo Indians. A wooden cross marks the spot where Illinois’ first martyr to the Catholic faith is believed to have died (which is located next to St. Patricks Catholic Church).
Seneca was first settled by Jeremiah Crotty, an entrepreneur and contractor who helped build the Illinois and Michigan Canal. Crotty built the first residence in 1850 and established the town in 1854 with a post office in his name. Residents retained the name Crotty Town until 1957, when they incorporated the town as Seneca. Before 1957 Seneca was known as Crotty in paper but known locally as Seneca.
The village of Seneca, formerly named Crotty after its founder, Jeremiah Crotty, was incorporated in 1865. The town was created during the construction of the Illinois and Michigan Canal for which Crotty was a contractor.
The Rock Island Railroad and the Illinois River also supported the creation and business of our town. Seneca is most known for its contributions during World War II when Chicago Bridge and Iron operated the Prairie Shipyard. 157 Landing Ship, Tanks (LST) were built here.
According to the 2021 census gazetteer files, Seneca has a total area of 6.58 square miles (17.04 km2), of which 6.21 square miles (16.08 km2) (or 94.42%) is land and 0.37 square miles (0.96 km2) (or 5.58%) is water.
Most of the village lies in LaSalle County, although a small portion extends into west central Grundy County. In the 2000 census, all of Seneca's 2,082 residents lived in LaSalle County. According to 2006 population estimates, 2,082 of the village's 2,087 residents (99.8%) lived in LaSalle County and 5 (0.2%) lived in Grundy County.
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Seneca, Illinois
Seneca is a village in LaSalle and Grundy counties in the U.S. state of Illinois. The population was 2,353 at the 2020 census, down from 2,371 at the 2010 census.
The LaSalle County portion of Seneca is part of the Ottawa, IL Micropolitan Statistical Area, while the small portion that lies in Grundy County is part of the Chicago metropolitan area.
A French missionary by the name of Father Gabriel de la Ribourde brought Catholicism to the Seneca area 175 years before St. Patrick's Parish was founded. In 1680, he was traveling with an exploratory party from Quebec when he was ambushed and killed by a band of Kickapoo Indians. A wooden cross marks the spot where Illinois’ first martyr to the Catholic faith is believed to have died (which is located next to St. Patricks Catholic Church).
Seneca was first settled by Jeremiah Crotty, an entrepreneur and contractor who helped build the Illinois and Michigan Canal. Crotty built the first residence in 1850 and established the town in 1854 with a post office in his name. Residents retained the name Crotty Town until 1957, when they incorporated the town as Seneca. Before 1957 Seneca was known as Crotty in paper but known locally as Seneca.
The village of Seneca, formerly named Crotty after its founder, Jeremiah Crotty, was incorporated in 1865. The town was created during the construction of the Illinois and Michigan Canal for which Crotty was a contractor.
The Rock Island Railroad and the Illinois River also supported the creation and business of our town. Seneca is most known for its contributions during World War II when Chicago Bridge and Iron operated the Prairie Shipyard. 157 Landing Ship, Tanks (LST) were built here.
According to the 2021 census gazetteer files, Seneca has a total area of 6.58 square miles (17.04 km2), of which 6.21 square miles (16.08 km2) (or 94.42%) is land and 0.37 square miles (0.96 km2) (or 5.58%) is water.
Most of the village lies in LaSalle County, although a small portion extends into west central Grundy County. In the 2000 census, all of Seneca's 2,082 residents lived in LaSalle County. According to 2006 population estimates, 2,082 of the village's 2,087 residents (99.8%) lived in LaSalle County and 5 (0.2%) lived in Grundy County.