Lake Oswego is a city in the State of Oregon, primarily in Clackamas County with small portions extending into neighboring Multnomah and Washington counties.As of the 2010 census, the city had a total population of 36,619, a 3.8% increase over the 2000 population of 35,278.
The Clackamas Indians once occupied the land that later became Lake Oswego, but diseases transmitted by European explorers and traders killed most of the natives. Before the influx of non-native people via the Oregon Trail, the area between the Willamette River and Tualatin River had a scattering of early pioneer homesteads and farms.As settlers arrived, encouraged by the Donation Land Claim Act of 1850 and the subsequent Homestead Act, they found the land under-occupied.Albert Alonzo Durham founded the town of Oswego in 1847, naming it after Oswego, New York. He built a sawmill on Sucker Creek (now Oswego Creek), the town's first industry.In 1910, the town of Oswego was incorporated. The Southern Pacific Railroad, which had acquired the P&WVR line at the end of the 19th century, widened it from narrow to standard gauge and in 1914, electrified it, providing rapid, clean, and quiet service between Oswego and Portland. The service was known as the Red Electric.In 1960, Oswego was renamed Lake Oswego when it annexed part of neighboring Lake Grove.