The actual process of applying for a visitor visa to enter the United States on a temporary basis will vary from country to country. First, check and see if you actually need a visa as citizens from certain countries can enter the U.S. without a visa on the VWP. For further information here see Do I need a visitor visa?
Although each country may have slight variations on how, where and when to apply for a visitor visa, the following basic guidelines will generally apply.
When you decide to apply for a visitor visa contact your local U.S. embassy or consulate (or check their website) to find out how the process is actually managed in your country. In most cases you will have to go for an interview at the embassy/consulate as part of the application process. In some countries these appointments can be arranged over the Internet or by phone. You may have to arrange an appointment in advance or - in some countries - you may be able to visit the consulate/embassy at a specific time without an appointment if they have visa clinics.
When making your inquiry/appointment, remember to check how much the visa will cost. You have to pay an application fee during the process. This fee is non-refundable so, if you do not get approval for a visa you will not get your money back. You will also need to get hold of the application form(s) and a list of the documents that you will need to take with you to your interview.
The documentation that you will show during your interview will include your:
In certain countries you may have to provide other documentation such as a photograph and proof of address and financial/employment status. If you are traveling to the U.S. for medical treatment then you may also be asked to provide information from your doctor about the treatment. Bear in mind, in some countries, that you will be asked to send your documentation to the embassy/consulate before your interview so it can be checked before you arrive.
The consular/officer will review your application and may ask other questions during your interview. In some countries you will be electronically finger-printed during the interview. Your application may have to be passed on to officials in the United States although this depends on your circumstances and the country from which you are making your application. The U.S. government estimates that most decisions given will be made within a few weeks.
In some cases you will be asked to supply additional information, to come for another interview and you may need to be finger-printed at this stage. This happens if your name (or a very similar name) comes up on a U.S. security database. These kinds of checks could add another 4-6 weeks to your application.
If your application is successful your visa will usually be sent to you. If you are turned down you can re-apply (see Visa refusal and reapplication).
Bear in mind that your visa here gives you access to a port of entry such as an airport. When you arrive in the U.S. you may also be asked to meet with an immigration official who will check all your paperwork.
Wherever you live, make sure to leave plenty of time to apply for your visa. Security in the United States has, obviously, been increased since 9/11 so the application process can take a little longer than it used to.