Mayor Boris Johnson has hailed Bishops Park and South Park as two of the safest open spaces in London.
They were among 31 in the capital chosen by Mr Johnson to receive a Safer Park Award for their work in combating crime.
Hammersmith & Fulham has its own parks constabulary which works to deal with offences including vandalism, drug taking and issues to do with dangerous dogs.
Mr Johnson said: "London boasts some of the most sublime green spaces in the country, and everyone deserves to enjoy their local parks without fear of crime. "The scheme recognises the tireless work many unsung local heroes put into making green spaces more pleasant for everyone.
"I congratulate all 31 parks for their outstanding efforts. I hope this inspires others to get involved to deliver real change to run-down areas. Each one has found its own way to turnaround the often low level crime and antisocial behaviour that scares people away."
Councillor Greg Smith, cabinet member for residents’ services, said: "It's a fact of life that parks can attract anti-social behaviour but this council works tirelessly to ensure that our open spaces are as crime free as possible.
"With the summer now approaching, parks visitors should rest assured our dedicated parks constabulary will continue to put all their efforts into fighting crime and keeping our parks safe."