- Caro City is a small city located in Tuscola County in the state of Michigan, United States. It has a population of approximately 4,000 people. The city is known for its friendly community, with a small-town atmosphere and a strong sense of community pride. Caro City offers a variety of amenities and services, including parks, schools, shopping, and dining options. The city also hosts various events and festivals throughout the year, attracting visitors from neighboring areas. Overall, Caro City is a peaceful and welcoming place to live or visit.