- Derby City refers to Derby, a city located in the East Midlands region of England. It is the county town of Derbyshire and has a population of approximately 260,000 people. Derby City is known for its industrial heritage, especially in the fields of engineering and manufacturing. It is home to several well-known companies, including Rolls-Royce and Toyota. Additionally, Derby City is famous for its historic sites such as Derby Cathedral and the Derby Museum and Art Gallery. The city is also known for its annual events like the Derby Festival, which includes the prestigious Derby horse race.