Does the US have a quota for how many can immigrate from certain countries?

Yes, the US has a quota for how many people can immigrate from certain countries. The Immigration and Nationality Act (INA) sets an annual limit on the number of immigrant visas that can be issued to nationals of each foreign country. The limit is called the "country cap."

For most countries, the country cap is set at 7% of the total number of immigrant visas that are available for that year. However, there are a few exceptions to this rule. For example, the country cap for Mexico is set at 20,000 visas per year, and the country cap for Canada is set at 40,000 visas per year.

The country caps are designed to ensure that no single country receives too many immigrant visas. This is important because it helps to maintain diversity in the US population.

In addition to the country caps, there are also other restrictions on immigration. For example, people who are convicted of certain crimes are not eligible to immigrate to the US. People who have certain diseases are also not eligible to immigrate.

The US immigration system is complex and constantly changing. If you are interested in immigrating to the US, it is important to consult with an immigration attorney to learn more about the requirements and restrictions.