The easiest way to do this would be to create a single-select field called “country”.
Then, you can paste a return-delimited list of your 200 country names into this field, and Airtable will automatically add all of those values into your single-select options.
Note that Airtable will increase the number of records in your table to accommodate all 200 country names, but you can delete the extraneous records afterwards.
Other ways of doing this:
A text field can be converted to a single-select field, and the text values will be added into your single-select options.
Create a single-select field, and import 200 country records into that field. (Each record would represent one country name.)
Any chance of a loom video to show us how to do this?
One of the best ways to do this would be to use JotForm, which has the native built-in ability to display all countries, states, and cities in the entire world.
After you choose a country, it will dynamically filter the state field for you automatically. After you choose a state, it will dynamically filter the city field automatically.
JotForm doesn’t currently have native integration with Airtable, so you will want to turn to Make’s JotForm integrations to get your form data from JotForm into Airtable.
There is a small learning curve with Make, which is why I created this basic navigation video to help. I also provide the links to a few other Make training resources there as well.