Final answer:
County governments may include a city, city and county, county, special districts, and all political subdivisions. They are created by the state government and administer state laws within their borders.
Step-by-step explanation:
In the United States, the group that may include a city, city and county, county, special districts, and all political subdivisions is county governments. Counties are the largest political subdivisions and their primary function is to administer state laws within their borders. They are created by the state government and operate under provisions set out in the state constitution.
County governments typically have elected officials called Supervisors or Commissioners leading them and they perform various duties such as keeping the peace, maintaining jails, collecting taxes, building and repairing roads and bridges, and recording deeds, marriages, and deaths.
Special districts are another type of government unit that have specific functions, such as local school districts. Townships may also be included in this group, and they usually exist as a subdivision of a county.