Yes - the UK's full name is The United Kingdom of Great Britain and Northern Ireland.
Northern Ireland, which consists of 6 of Ireland's 32 counties, is a part of the United Kingdom, along with England, Scotland and Wales.
The Republic of Ireland, which is the other 26 counties, is not
part of the United Kingdom and is an independent country.The
British planted foreign settlers who were mainly Protestant native
irish Romantic Catholic to divide irish people the better For
Britain to rule it. The British people have really bad habit of
invading other people's countries taking thier land forcing them be
part of British Empire or United Kingdom in Ireland case
Yes, Northern Ireland is part of the UK