Ms Tian's death was "unbelievable" she said, and had shattered people's view of the peninsula being safe.
"It's so important for us to cone together because we're the kind of community that see each other every day."
She hoped that "by coming together we can give the Tian family our love and support".
"And also for the community - we're here for the good but we're also here for the bad."
"We're more than a neighbourhood, we're all together, we're a family really.
"I can't get over the tragedy. It could have been anyone, that's what's so awful about it. I just hope that people out there get a sense of the type of community that we are."
People had become more safety conscious since the killing, she said.
"We want to feel safe, this is a beautiful neighbourhood.
"We wish all the most heartfelt, deepest sympathies to the family and if there's anything we can do I hope they understand that, as a community, we are here for them."
One woman who attended the vigil, who did not wish to be named, said she wanted to "show the family that we're here" and that "we do care".
"It could have been any of us, that's really a really big part of it as well," she said.
"My elderly mother-in-law has been living with me for a while and she would have been on her own all day as well.
Mr Spackman invited everyone to light a candle, regardless of whether they were religious.
"Feel free to sit in silence, come light a candle, say a prayer, whatever it is that you do," Mr Spackman said.
A woman from the church also spoke to the gathering. She said the vigil was about coming together as a community "and saying we want to show love and we want to show support to this family, who are so hurting in our community".
She added: "It's about a family that we want it love an support."
A moment's silence was held at the end of the vigil, followed by the Lord's Prayer.
Police officers then led mourners on a silent march to Mrs Tian's home.
People outside a nearby service station and dairy stood in respectful silence as the crowd walked past.
At the house, mourners put flowers at the gate, beside a police patrol car that is guarding the entrance.
Melissa Fleming spoke to the crowd, saying: "We would like to extend our warmest condolences and absolute tragic sympathies to the family that are here."
The community was standing beside the family "100 per cent", she said.
Irene Razon, who attended the vigil with her husband Jay, and children Aira, 7, and Airus, 9, said they were "here to support the family".
Ms Tian's homicide was a rare occurrence, he said.
"This type of thing is unprecedented around here, I've never heard anything like this before."
Following the vigil and walk, Mr Spackman said he organised the memorial to "get the community together and show the family that we're here for them and show the community that we're here for each other as well".
He had "no idea" the turn out would be so large, he said.
"On Sunday we threw aroudn the idea of doing it and it has just gone from there really quickly, but it's been amazing the support we've had as well."
While there was a lot of nervousness and some fear in the community following the violent death, "we just have to show that we're not going to stand for it", he said.
On Saturday, a post-mortem examination concluded that Mrs Tian was the victim of a prolonged attack, which included multiple blows to her face and head.
A team of around 25 investigators are working on the case, including forensic experts.
Police say the killer would likely have been covered in blood when leaving Mrs Tian's property.
Detectives have called in criminal profilers as they try to find out who was behind the attack.
They want anyone who witnessed suspicious behaviour in the Te Atatu area or was the target of an attempted break-in that they haven't reported to phone them on 0800-77-22-71.