Mia Lay, 20, was honoured on National Police Remembrance Day alongside two Victorian colleagues more than a year after they were killed by Dezi Freeman at a rural property.
Constable Lay had been on the force for 16 months before her death, crashing in pursuit of a stolen car at Redfern in Sydney on Friday.
Attendees talked of her youth and dedication at a solemn service in front of the Police Wall of Remembrance in Sydney's Domain on Tuesday morning.
NSW Premier Chris Minns said Const Lay was "talented, optimistic, calm under pressure" and a stellar athlete who could have done anything but chose to serve.
The 20-year-old's death followed her graduation from the police academy at 19 and school the year before that, he noted.
"It's a reminder that we ask our police officers to grow up incredibly quickly," Mr Minns said.
"When their mates from school are going to uni or taking a gap year or getting a start on an apprenticeship, the men and women of the police force are already on the job, walking into danger well beyond their years."
Police Commissioner Mal Lanyon thanked Const Lay and loved ones for her service, saying they would always be a part of the blue family.
Mr Lanyon said the polished granite memorial wall told tales of courage through each of the 286 inscribed names.
In 2027, Const Lay's name will be formally added to the National Police Memorial in Canberra, where 832 touchstones engraved on the memorial wall represent police lives lost since records began in 1803.
Police added four new touchstones to the monument on Tuesday, including plaques for Victoria Police officers Neal Thompson and Vadim de Waart-Hottart.
The pair were killed in Porepunkah in August 2025 while serving an arrest warrant.
Victoria Police deputy commissioner Bob Hill noted the service had marked more than a year since their deaths during a mission to search alleged pedophile Freeman's property.
"Thankfully, since that event, we have not lost any more members in the line of duty," Mr Hill said.
"Every day, our officers deploy knowing full well that they may be required to place themselves in harm's way to protect the broader community."
Their names are also engraved on the honour wall at the Victorian Police Memorial, alongside 176 other fallen Victorian officers.
Fallen officers Maxine Bembridge and Mark Bransgrove will also be enshrined with touchstones on the national wall in Canberra.
Western Australia Detective Senior Sergeant Bembridge died in hospital days after a crash while she was driving to work on the outskirts of Perth in May.
Sergeant Bransgrove, who served NSW Police across almost four decades, died in July 2025 from a medical condition as a result of his duties, eight years after retiring.
Displays across the nation included a march to Melbourne's police memorial.
Canberra's National Police Memorial held its 20th national service including a procession of hundreds of officers over the Kings Avenue Bridge.
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