- Oakdale City is a city located in the San Joaquin Valley of California. It is part of Stanislaus County and has a population of approximately 23,000 people. Oakdale is known for its agricultural community, with many residents working in the farming and livestock industries. The city features a historic downtown area with shops, restaurants, and a farmer's market. Oakdale is also home to the Oakdale Cowboy Museum, which showcases the city's western heritage. The surrounding area offers outdoor recreational activities such as hiking, fishing, and boating.