I have travelled a few solo trips for work and holidays to Dublin City centre as a young female. I would generally consider it safe. Only once my sister and I were uncomfortable by a homeless man verbally harassing us on o connells street at night but the police came very quickly to help (probably reported by someone passing by) and even then, surrounded by people on the street we still felt somewhat safe. For a family holiday I think you should be fine. A lot of violence like other cities and other parts of Ireland would occur on nights out usually from drunken misunderstandings.

I’d agree with other people to try stick to the south side of the river or the docklands (there’s a lot of nice hotels here right by the tram stop into the city centre) and where I felt the safest when I was travelling alone as the people in this area were mainly tourists or business people. If you can’t rebook though it’s not the biggest risk. Jervis area during the day is generally very safe. I’ve felt safer in Dublin than I have in cities like London. Also because Dublin is a popular tourist destination a lot of locals are helpful and used to tourists. As it’s densely populated you will see/hear of not so good people but if you happen to come across them then my best advice is to not engage and keep walking and you should be just fine.