- Upland is a city located in San Bernardino County, California, United States. It is situated at the base of the San Gabriel Mountains and is part of the Inland Empire region. Upland has a population of approximately 77,000 people and covers an area of 15.62 square miles. The city is known for its historic downtown area, suburban neighborhoods, and views of the surrounding mountains. Upland offers a range of amenities and attractions, including parks, shopping centers, and recreational opportunities.