What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
We actually do have US states available for drop downs:
As for other countries' states/cities, you will have to provide them manually, by clicking the Options button after selecting the added dropdown field.
If you don't feel like adding them manually, here are a few ready-made widgets containing cities/states/provinces of select countries:
Here's another widget that does exactly what you want:
You can choose to show only 'United States' in the widget's option.
Here's how it should look: