NO - although some form of ID is recommended and if travelling by Air, most Airlines now demand a passport- check before you book
Ireland and the UK are both in the common travel area and do not have Immigration controls between them.
You don't need a passport to travel between the UK and the Republic of Ireland.
You will certainly need a passport - since Ireland is off the UK mainland.
France , Europe , Ireland , Great Britten
only if you are going to Northern Ireland, you need a passport to travel between England and Ireland.
Generally you will need a passport to visit Ireland. As a general rule, you should always get a passport when travelling internationally. The fact that you grandmother is Irish, does not mean you can travel to Ireland without any passport. You may actually be entitled to get an Irish passport. See the related question below for details of documents needed to visit Ireland.
No if she has a passport she could travel anywhere without a USA passport
If you are a British or Irish citizen you can travel anywhere in the Common Travel Area (UK, Republic of Ireland, Isle of Man and Channel Islands) without a passport. Airlines require photo ID, however.
Yes. To enter the Dominican Republic you will need your passport. period.
Yes
Yes.
If you are not an Irish or British citizen, you will need a passport. Ireland and Britain have a free travel area arrangement, but most people will still bring a passport anyway.If you are not an Irish or British citizen, you will need a passport. Ireland and Britain have a free travel area arrangement, but most people will still bring a passport anyway.If you are not an Irish or British citizen, you will need a passport. Ireland and Britain have a free travel area arrangement, but most people will still bring a passport anyway.If you are not an Irish or British citizen, you will need a passport. Ireland and Britain have a free travel area arrangement, but most people will still bring a passport anyway.If you are not an Irish or British citizen, you will need a passport. Ireland and Britain have a free travel area arrangement, but most people will still bring a passport anyway.If you are not an Irish or British citizen, you will need a passport. Ireland and Britain have a free travel area arrangement, but most people will still bring a passport anyway.If you are not an Irish or British citizen, you will need a passport. Ireland and Britain have a free travel area arrangement, but most people will still bring a passport anyway.If you are not an Irish or British citizen, you will need a passport. Ireland and Britain have a free travel area arrangement, but most people will still bring a passport anyway.If you are not an Irish or British citizen, you will need a passport. Ireland and Britain have a free travel area arrangement, but most people will still bring a passport anyway.If you are not an Irish or British citizen, you will need a passport. Ireland and Britain have a free travel area arrangement, but most people will still bring a passport anyway.If you are not an Irish or British citizen, you will need a passport. Ireland and Britain have a free travel area arrangement, but most people will still bring a passport anyway.
For the EU citizen, to travel inside EU (like from Ireland to Poland) a valid ID is required, but not necessary a passport.