Starting from August 1, only those who have lived in the city for at least three of the last six years will be considered for a job at Britain's largest police force.
The Metropolitan Police Service (MPS) believes the move will make the service more representative of those it serves.
"The introduction of this new criteria for applicants to the MPS will help ensure the force is more resilient and more reflective of the city it serves," the Met said in a statement.
"This reflects a shared ambition by the Met and the Mayor, Boris Johnson to recruit a workforce that reflects and understands London's diversity and has the skills and cultural competencies needed to police a great global city," it added.
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The policy change will not affect serving officers, existing MPS police staff, members of the Special Constabulary, or existing police officers seeking to transfer from other UK forces.
"By putting Londoners first, we can fill the Met's ranks with the talented recruits who understand the people and culture of this great global city the best", he said.
"Every police officer is always and will always be selected on merit, but there is more than enough talent in this great city to give the Met all the devoted and skilled new recruits they need to go on keeping Londoners safe," he added.
"Recruiting Constables with a knowledge and understanding of this reality through living in the capital makes sense to help us achieve this aim", he said.
"They will have a better understanding of local issues, knowledge of local communities and an inbuilt insight into London's varied cultures. We need great talent to help us fight crime", he added.