The visit follows an incident on 29 April when two Jewish men were stabbed in Highfield Avenue.
The King has visited Golders Green to show his support for the area’s Jewish community after the stabbing attack last month.
There were cries of “long live the King” and one man told Charles he was “always welcome” in the area.
The King told him “it’s a dangerous world isn’t it?” and responded “I know” when the member of the public said: “What happened in Golders Green was horrific”.
Charles told others further down the long line of people waiting to see him: “I hope I haven’t disrupted your normal activities too much.”
The visit follows an incident on 29 April when two Jewish men were stabbed in Highfield Avenue.
The men, aged 34 and 76, were treated at the scene for stab wounds, with both being taken to hospital.
After the attack, the UK terror threat level was raised to severe – meaning an attack is likely within the next six months. It is the first time it has been raised this high since 2021.
During the King’s visit, dozens of smiling well-wishers, many from the Jewish community, gathered to shake his hand and express their gratitude for his presence.
Children were among those lining the streets, smiling with excitement after catching a glimpse of the monarch.
On Thursday, King Charles visited a Jewish Care charity centre, where he met victims Shloime Rand, 34, and Moshe Ben Baila, 76, alongside Ephraim Mirvis and Mark Rowley.
The King also spoke with members of the Jewish community patrol group Shomrim, who helped respond to the attacks on 29 April.
Speaking afterwards, Mr Shine, who suffered a stab wound to the neck while waiting at a bus stop during the attack, described the King’s compassion and kindness.
“The most inspiring thing was that he didn’t let go of my hand,” he said. “It was incredible. He may be the King, but I felt a genuine warmth and concern from him.”
“We truly feel we have a genuine friend in the King,” he added.