Oswego County is named for the Oswego River which is named for the Iroquoian word meaning “the outpouring” referring to the mouth of the river.
Surrounding County Courthouses:
N – Jefferson County
E – Lewis County and Oneida County
S – Madison County, Onondaga County and Cayuga County
W – Lake Ontario and Ontario, Canada
Created: March 1, 1816 
County Seat:
Oswego 1816 - present
County Courthouse – Oswego
Location: 25 East Oneida Street / East 2nd Street
Built: 1859 – 1860
Style: Classical Revival
Architect: Horatio Nelson White of Syracuse
Contractor: Smith & Ratigan and Williams & Atkinson
Description: The building faces north and is a two story limestone structure. The building is located on landscaped grounds in the center of Osewgo. The north front has a projecting center section with three large arches on the first story and four green-blue colored columns on the second story with pediment above. At the top is a large open cupola with thin columns and round dome. The east and west wings have small cupolas above a pediment. An addition was on the south side in 1962. The architect was Sargent-Webster-Crenshaw and Folley and the contractor was J G A Construction Corporation.
County Administration Building – Oswego
Location: 25 East Bridge Street / East 2nd Street
Built: 1895 – 1896
Style: Georgian
Architect: J H Seeber
Contractor: A Von Wagner & Company
Description: The building faces south and is a three story red colored brick structure. The building is located on landscaped grounds in the center of Oswego to the west of the courthouse.
County Courthouse – Pulaski
Location: 7426 Bridge Street / South Jefferson Street
Built: 1859 – 1860
Style: Classical Revival
Architect: Zina D Stevens
Contractor: David Bennett
Description: The building faces north and is a two story red colored brick structure. The north front has a high portico supported by four large white colored columns with pediment at the roof line. The base of the building is course stone. The eaves overhang at the roof line. The building was constructed around the original 1819 courthouse. An addition was added on the south side in 1992.
See: The 5th Judicial District includes Herkimer County, Jefferson County, Lewis County, Oneida County and Onondaga County.
County Courthouse - Oswego
County Administration Building - Oswego
County Courthouse – Pulaski
Photos taken 2010