Meriden is an unincorporated community in LaSalle County, Illinois, and is located east of Mendota. The community has East 7th Street running north–south through the community, and North 44th Street making a T-intersection south of Meriden with East 7th Street. U.S. Highway 34 runs about an eighth of a mile south of Meriden. It is located in Meriden to…Meriden is an unincorporated community in LaSalle County, Illinois, and is located east of Mendota. The community has East 7th Street running north–south through the community, and North 44th Street making a T-intersection south of Meriden with East 7th Street. U.S. Highway 34 runs about an eighth of a mile south of Meriden. It is located in Meriden township.