A Port of Entry (POE) is a officially designated place where people enter a country legally. A port of entry can be a international airport, a road and rail crossings on a land border or a seaport. There are more than 300 port of entries in the U.S..You can locate a port of entry at U.S. Customs and Border Protection website.
In the U.S., the U.S. Customs and Border Protection (CBP) are responsible for the border security. Both returning U.S. citizens and foreign visitors will be screened at port of entries. For U.S. citizens, they are automatically admitted upon verification of citizenship. For temporary visitors and immigrants, they will be interviewed and authorized admission at port of entries with required documents (passport, green card or visas). The CBP officers determine their admissibility and how long the visitors are authorized to stay.
What happen at a port of entry?
Once you arrives at a port of entry, you will have to pass through the CBP counter. The first thing you need to do is hand all your travel documents to the immigration officer. Immigration officer will verify your identity and travel documents and ask you few questions about your purpose of travel. If you are admitted, they will take a picture of you and have your fingerprint scanned. Your passport will be stamped with the date of entry and duration of stay.
Wait time at land port of entries
If you drive or walk to a canada border port of entry or a mexican border port of entry. You can check the border wait times at CBP website in advance.