Updated November 11, 2024

What does the US embassy do? Citizen services, visa interviews and diplomacy explained

A US embassy is the headquarters for US diplomats and government representatives in a foreign country. Its main role is protecting and assisting American citizens who travel or live abroad, while consular officers interview foreign nationals applying for visas. Embassy staff also work with the host government, support American businesses, and manage cultural and educational exchanges.

What is a US embassy and how does it work?

The National Museum of American Diplomacy explains that a US embassy is the headquarters for US diplomats and government representatives serving in a foreign country. It is led by an ambassador who serves as the personal representative of the US President.

A large embassy can have many buildings. The main embassy building is called the chancery, and any additional buildings are called annexes. In some countries, American staff live on the embassy compound for safety. The ambassador's residence is also used for embassy functions, and its public areas may display art on loan from American museums.

US embassies and consulates abroad, like foreign embassies in the United States, hold a special legal status. While the host government is responsible for the security of US diplomats and the area surrounding the building, the embassy itself belongs to the country it represents. Representatives of the host country cannot enter an embassy without permission, and an attack on an embassy is considered an attack on the country it represents.

• Citizen services: Assisting American citizens who travel to or live in the host country with passports, legal documents, and emergency help.
• Visa screening: Interviewing citizens of the host country who want to travel to the United States for business, education, or tourism, and deciding immigrant visa cases.
• Diplomatic engagement: Working with the host government, local businesses, nongovernmental organizations, media, educational institutions, and private citizens to increase mutual understanding of the United States and its policies.
• Economic and security work: Analyzing local political and economic conditions to help US businesses, and training host government police and military when requested by the host country.

What is the difference between a US embassy, a consulate and a mission?

Travelers and visa applicants often use the words embassy, consulate, and mission interchangeably, but each has a specific meaning in diplomacy.

The United States maintains only 1 embassy and 1 ambassador in the capital of a foreign country. In large countries, the United States may operate several consulates in other large cities. Consulates are branch offices that follow the lead of the ambassador to keep a unified approach to foreign policy, and they carry out many of the same services as an embassy on a smaller scale. While the embassy devises policies in the capital, diplomats at a consulate often carry out more of the work on the ground.

In diplomatic terms, the word mission refers collectively to all embassies, consulates, and other diplomatic posts in foreign countries, and it also refers to US diplomatic representation to international organizations. On the US government's directory of diplomatic posts, for example, you will find bilateral embassies alongside posts such as the US Mission to the European Union, the US Mission to NATO, the US Mission to the African Union, the US Mission to ASEAN, and the US Mission to the United Nations, as well as the American Institute in Taiwan.

Comparison of US diplomatic posts

How does a US embassy help American citizens abroad?

The State Department's Bureau of Consular Affairs states that its highest priority is to protect the lives and serve the interests of American citizens. Led by the Assistant Secretary for Consular Affairs, the bureau serves as the public face of the Department of State for travelers and Americans living overseas.

Every day at embassies and consulates around the world, consular officers provide direct, personal assistance to US citizens during routine milestones and unexpected crises.

• Passports: Issuing and replacing lost passports for American citizens traveling or living abroad.
• Births, marriages, and adoptions: Assisting families with birth registrations, marriage documentation, and international adoptions.
• Medical emergencies: Assisting injured or ill American travelers overseas.
• Arrests and deaths: Serving citizens and their families during arrests or deaths abroad.
• Disasters and crises: Assisting Americans during natural disasters and crises, and consulting with foreign governments and international organizations to stop illnesses from becoming pandemics or conflicts from escalating.

How does a US embassy handle visa interviews and applications?

For citizens of the host country, the consular section of a US embassy or consulate is the place where US visa decisions happen. The Bureau of Consular Affairs explains that issuing visas to qualified visitors helps promote international visits to the United States while maintaining border security.

For temporary travel (nonimmigrant visas), US Foreign Service Officers at the embassy interview citizens of the host country who wish to travel to the United States for business, education, or tourism, and consulates also issue visas to visit, study, and work in the United States. During the interview, the officer reviews your application and questions you directly to decide whether you qualify for the visa category.

For permanent residence (immigrant visas and Green Cards), embassies and consulates abroad handle the pathway USCIS calls consular processing. If you are outside the United States and are the beneficiary of an approved immigrant petition with an immediately available visa number, you apply at a US Department of State consulate or embassy abroad for an immigrant visa so you can enter the United States and be admitted as a lawful permanent resident. (Applicants already inside the United States use a different pathway called adjustment of status.)

Step-by-step checklist: how consular processing works for a Green Card

If you are applying for a Green Card from outside the United States through a US embassy or consulate, USCIS outlines an 8-step consular processing path. Use this checklist to track your case from the initial petition to your card arriving in the mail.

• Step 1, Determine your basis to immigrate: Confirm which Green Card eligibility category you fit, such as a petition filed by a family member or employer, refugee or asylum status, or other special provisions.
• Step 2, File the immigrant petition: Have your sponsor file the right form (or file for yourself if eligible). For family-based cases, a US citizen or lawful permanent resident relative files Form I-130 (Petition for Alien Relative). For employment-based cases, a US employer files Form I-140 (Petition for Alien Worker), or an entrepreneur investing significant capital files Form I-526 (Immigrant Petition by Alien Entrepreneur). Special categories use Form I-360 (Petition for Amerasian, Widow(er), and Special Immigrant), while most humanitarian programs do not require an immigrant petition.
• Step 3, Wait for a decision on your petition: USCIS notifies the petitioner of its decision. If denied, the notice gives the reasons and states whether you can appeal. If approved and you live abroad (or choose to process abroad), USCIS sends the approved petition to the Department of State's National Visa Center (NVC), where it stays until an immigrant visa number is available.
• Step 4, Wait for notification from the National Visa Center: The NVC collects visa application fees (commonly called fee bills) and supporting documentation. It notifies both the petitioner and beneficiary when it receives the petition, when a visa number is about to become available, and when to submit fees and documents.
• Step 5, Go to your consular interview appointment: Once a visa is available or your priority date is current (earlier than the cut-off date in the monthly Visa Bulletin), the consular office schedules your interview, processes your case, and decides if you are eligible for an immigrant visa.
• Step 6, Notify the NVC of any key changes: You do not need to contact the NVC for routine updates, as they will contact you. However, you must contact the NVC if you change your address, if you were under 21 and have now reached age 21, or if you change your marital status, as these changes can affect your eligibility or visa availability.
• Step 7, Receive your Visa Packet and enter the United States: If the consular officer grants your immigrant visa, you receive a sealed Visa Packet. Do not open this packet. Pay the USCIS Immigrant Fee online (which USCIS uses to process the packet and produce your Green Card) after receiving the packet and before departing for the United States. At the US port of entry, hand the unopened Visa Packet to the US Customs and Border Protection (CBP) officer, who inspects you and determines whether to admit you as a lawful permanent resident.
• Step 8, Receive your Green Card in the mail: Once you have arrived and paid the USCIS Immigrant Fee, your Green Card is mailed to you. If you do not receive your Green Card within 90 days of arrival, call the USCIS Contact Center at 800-375-5283 or submit an inquiry on the USCIS e-Request Non-Delivery of Card page.

What do the other sections of a US embassy do?

Beyond the consular windows where citizens and visa applicants are served, an embassy runs political, economic, commercial, public diplomacy, development, and law enforcement programs. When the US ambassador convenes a Country Team meeting, the heads of the Consular, Political, Economic, Management, Security, and Public Diplomacy sections all sit at the table.

Each section carries out distinct work that supports Americans both abroad and back home:

• Economic and political sections: Analyze the political and economic situation in the host country to help US businesses find partners and customers, and work with local political leaders to keep finance laws and regulations friendly for American businesses.
• Foreign Commercial Service and Foreign Agricultural Service: Help American businesses connect with local counterparts in the host country to increase American exports.
• Public affairs and cultural exchanges: Present US policy, values, and culture to local media and the public, help visiting American journalists get background and interviews for their stories, and sponsor educational, professional, and cultural exchanges that build long-term ties among students, academics, scientists, entrepreneurs, and civil society figures.
• US Agency for International Development (USAID): Works with host country institutions to encourage agrarian and business enterprise and to enhance local infrastructure.
• Military attaches and law enforcement: Manage programs and conduct exercises that build better coordination between army and police services, train host government police and military when requested, and work at embassies and consulates with US and foreign law enforcement agencies to combat international crime, verify records, and track human rights abuses.
• Bureau of Diplomatic Security (DS): Serves as the security and law enforcement arm of the Department of State, responsible for providing a safe and secure environment for American diplomats.

Who works inside a US embassy?

An embassy brings together American diplomats, civil servants from across the federal government, and citizens of the host country, all working under a single chain of command. Regardless of which federal agency employs them, all embassy employees work under the direction of the ambassador.

By our count from the State Department's agency list, in addition to the Department of State, 6 other US federal agencies and departments are commonly represented inside a US embassy: the US Agency for International Development (USAID) and the Departments of Defense, Commerce, Justice, Homeland Security, and Agriculture.

While Americans handle sensitive roles relating to US foreign policy and national security, most of the workforce at a US embassy actually comes from the host country. These employees are called Locally Employed Staff, and they provide knowledge of the local language and culture, regional skills, and connections to host government and civil society leaders.

Key personnel and agencies inside a US embassy

What the consular officer may ask at your embassy visa interview

Whether you are visiting a US embassy or consulate for a temporary visitor, student, or business visa interview, or attending your Step 5 immigrant visa appointment under consular processing, you will speak directly with a US Foreign Service Officer or consular officer. Understanding what the officer is checking helps you bring the right records and answer clearly.

• "What is the purpose of your trip to the United States?" (Nonimmigrant interviews): The officer checks whether your planned activities match a business, education, or tourism visa category. Prepare by knowing your exact itinerary, school program, or business meeting details so you can state them in one clear sentence.
• "Have your address, age category, or marital status changed since your petition was approved?" (Immigrant visa interviews): Under USCIS consular processing rules, turning 21, marrying or divorcing, or changing your address can change your immigrant visa eligibility or visa availability. Prepare by reporting any of these 3 changes to the National Visa Center before your interview and bringing updated civil documents.
• "Who filed your immigrant petition, and what is your relationship or job offer?" (Immigrant visa interviews): The consular office processes your case to decide if you are eligible under the Form I-130, Form I-140, Form I-526, or Form I-360 petition sent to the National Visa Center. Prepare by reviewing the facts on your approved petition and bringing the supporting documentation requested by the NVC.

Practice example

What is the purpose of your trip to the United States, and why are you applying for this visa now?

When the Foreign Service Officer asks about the purpose of your trip at the embassy or consulate window, state whether you are traveling for business, education, or tourism (or immigrating under an approved petition) in your first sentence. Give the exact dates of your trip, the city or institution you will visit, and how the timing fits your current job or studies in your home country. If you are attending an immigrant visa interview through consular processing, name the petitioner who filed your Form I-130, Form I-140, Form I-526, or Form I-360 and confirm that your marital status, age category, and address match the records you submitted to the National Visa Center. Have your passport, your application confirmation, and the supporting documentation requested for your visa category organized so you can hand over any record if the officer asks.

US Foreign Service Officers at the embassy interview host country citizens to verify that their travel purpose fits a valid business, education, tourism, or immigrant visa category while protecting US border security. Giving clear, specific facts that match your forms lets the officer confirm your eligibility quickly.

This is interview practice, not legal advice. For questions about your own case, talk to an immigration attorney. Visaful is not affiliated with the U.S. government or the Department of State.