Dual Citizenship – Is it Allowed? (from Immigrationnewsradio.com)

Dual citizenship or dual nationality refers to being a citizen of two countries simultaneously. We are often asked whether or not the United States will allow dual citizenship with foreign nationals of other countries. We have to start with the fact that each country has its own citizenship laws based on their particular policies. Sometimes dual citizenship occurs by choice; other times, it occurs automatically by operation of law. Full article from immigrationnewsradio.com.

Questions and answers on dual US/other citizenship

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Wikipedia--Multiple Citizenship

Multiple citizenship is a status in which a person is concurrently regarded as a citizen under the laws of more than one state. Multiple citizenships exist because different countries use different, and not necessarily mutually exclusive, citizenship requirements. Colloquial speech refers to people "holding" multiple citizenship but technically each nation is making a claim that this person be considered its national. For this reason it is possible that a person be a citizen of one, none or many countries. more

Dual Nationality/Dual Citizenship

The concept of dual nationality means that a person is a citizen of two countries at the same time. Each country has its own citizenship laws based on its own policy.Persons may have dual nationality by automatic operation of different laws rather than by choice. For example, a child born in a foreign country to U.S. citizen parents may be both a U.S. citizen and a citizen of the country of birth. more

From United States Department of State

Am I a Citizen of the United States?

Many people are citizens of America by birth or through some other part of the immigration law and don’t even know it. If you are a citizen by law, you do not need to take the citizenship and naturalization test through the INS or U.S. Citizenship and Immigration Services. Even if you have no documentation or consider yourself an “illegal alien”, if you are citizen by law, your lack of documentation does not change the fact that you are a citizen – you just need proof of it. More

by Vincent Martin Immigration Attorney

U.S. Citizenship by Birth or Through Parents

You may already be a U.S. citizen and not know it.

U.S. citizenship can be obtained in one of four ways:

• birth in the United States or its territories
• birth to U.S. citizen parents (called "acquisition" of citizenship)
• naturalization (obtaining citizenship after an application and exam), or
• naturalization of one's parents (called "derivation" of citizenship).

Some people are already U.S. citizens and don't know it. Most of these people fall into one of three groups:

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by www.findlaw.com