Gladstone is a city located in Clackamas County, Oregon, United States. As of the 2000 census, the city had a total population of 11,438. Gladstone is a four square mile suburban community twelve miles south of Portland at the confluence of the Clackamas River and the Willamette River. To the south, across the Clackamas, is Oregon City, across the Willamette is West Linn, to the north is Milwaukie. In the higher areas one can easily see Mount Hood in the distance to the northeast, and in some places Mount Adams and Mount St. Helens can also be seen. Gladstone apartments for rent comparison page shows most up to date rent information on Gladstone apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.