Gladstone is a city located in Clackamas County, Oregon, United States. Gladstone was founded by Judge Harvey Cross in 1889, and formally incorporated on January 10, 1911. It was named after the British statesman William Ewart Gladstone. The population was 11,497 at the 2010 census. Gladstone is an approximately four-square-mile (10 km²) suburban community, twelve miles (19 km) south of Portland, the largest city in Oregon, and located at the confluence of the Clackamas and Willamette rivers. The city has a single high school, Gladstone High School, and a single library that is part of the Library Information Network of Clackamas County. Gladstone has held several important cultural and social events, hosting both the inaugural Clackamas County Fair and the Oregon State Fair, before both were moved to more spacious locations. Both Secretary of State William Jennings Bryan and presidential candidate Theodore Roosevelt have given public speeches in the city.