From Pengorffwysfa, Gwynedd to all cities in Hertfordshire starting with letter N
- Napsbury, Gwynedd
- Napsbury Park, Gwynedd
- Nash Mills, Gwynedd
- Nast Hyde, Gwynedd
- Nasty, Gwynedd
- Nether Street, Gwynedd
- Nettleden, Gwynedd
- New Greens, Gwynedd
- New Ground, Gwynedd
- New Mill, Gwynedd
- New Town, Gwynedd
- Newgate Street, Gwynedd
- Newnham, Gwynedd
- Newsells, Gwynedd
- Newtown, Gwynedd
- Nobland Green, Gwynedd
- Nomansland, Gwynedd
- Norcott Hill, Gwynedd
- North Mymms, Gwynedd
- North Watford, Gwynedd
- Northaw, Gwynedd
- Northaw Valley, Gwynedd
- Northchurch, Gwynedd
- Norton, Gwynedd
- Nup End Green, Gwynedd
- Nuthampstead, Gwynedd