- Blythe City is a city located in Riverside County, California, United States. It is situated in the southeastern part of the state, near the Arizona border. Blythe is known for its desert climate and is often referred to as the "Gateway to the Palo Verde Valley." The city's economy primarily relies on agriculture, tourism, and energy production. Blythe is also a popular destination for outdoor enthusiasts, offering opportunities for boating, fishing, off-roading, and bird-watching along the Colorado River. The city has a population of approximately 19,000 residents and offers amenities such as schools, parks, shopping centers, and healthcare facilities.