When you first view the Geographic report, you’ll see a list of countries in the table, but this can be switched to a list of cities instead.
To view the cities, start by clicking the Group by Country button in the toolbar.

In the modal, you’ll see that Country is selected by default. Switch it to City and then click the Apply button.
Once this is done, you’ll see a list of the top cities in the data table below.

You’ll also see a Subdivision column, which includes the region or state the city resides in. With cities and subdivisions displayed, you can also use these columns in the report filters.