Auckland, Wellington, Christchurch and Dunedin are four of more than 800 cities around the world where people are marching today to show support for ending gun violence in schools.
The march is part of the international March for Our Lives movement calling for stricter gun laws and an end to school shootings.
Wellington organiser Aoife Crumley said while school shootings are not an issue in New Zealand, it was a chance to show support for the US, where they are.
"We can't change their legislation but we can show support to the victims and their families - and that's the first step."
"These aren't just numbers, these are actual people with families, life stories and goals, yet someone who can buy a semi-automatic assault rifle can just go and take that away from them."
People marched from Midland Park in central Wellington, to the US embassy where they did a silent protest.
In Auckland, one of the organisers Sophie Elborough said they were happy with the turnout.
"We had about 160 people, so pretty happy with that."
"We thought it would be mostly students but it was a huge age range, there were families and people from all walks of life."
Ms Elborough said it was important to keep the momentum going.
"It's about keeping that mobilisation and making sure it's at the forefront of people's minds."
Marches also took place in Christchurch and Dunedin.