As a visitor to Ireland you can drive on a driving licence from any state outside the EU/EEA for up to one year, provided the driving licence is current and valid.
If you are a citizen of another country and are living permanently in the U.S., you may be eligible to apply for a driver's license from the state where you live. The residency requirement for obtaining a U.S. driver's license is different in each state.
You will not be able to renew or replace your licence from abroad if: You are living and working in any EU country or recognised state. You will need to contact the licensing authority in that country to exchange your current Irish driving licence.
Foreigners can typically use their driver's license for 3 to 6 months 1 from entry date into the US. After this duration, the license won't be valid, and you'll need an International Driving Permit (IDP) to keep driving.
If you also have an International Driving Permit (get it from the Irish authorities) , yes you can drive as a visitor in the USA. You must carry your Ireland driver's license and your IDP when you are behind the wheel.
To convert a foreign license, you will be required to pass a vision test and a written knowledge test, with a valid, unexpired, foreign license you may not be required to take the road skills test. Only foreign license that the DMV can authenticate will be accepted.
In most states, driver's license applicants must provide proof of their lawful residency status. For example, they might provide a naturalization certificate or green card. However, the District of Columbia and the following 16 states allow undocumented immigrants to obtain driver's licenses: California.