Lake Oswego is a city in the U.S. state of Oregon, primarily in Clackamas County, with small portions extending into neighboring Multnomah and Washington counties. Located about 8 miles (13 km) south of Portland and surrounding the 405-acre (164 ha) Oswego Lake, the town was founded in 1847 and incorporated as Oswego in 1910. The city was the hub of Oregon's brief iron industry in the late 19th century, and is today a suburb of Portland. The population in 2010 was 36,619, a 3.8% increase over the 2000 population of 35,278.