The discovery was made at College Green in West Street just after 9.20am yesterday (September 15).
Officers were called to the scene and the man was pronounced dead shortly after.
The incident is not being treated as suspicious and a file will be prepared for the coroner.
The park was cordoned off with police tape from West Street while police carried out an investigation, according to photos posted on X (formally known as Twitter).
However, we understand the cordon has since been lifted.
A spokesperson for the Metropolitan Police said: “Police were called at 9.22am on Sunday, September, 15, to the body of a man found on a bench in the College Green area of Bromley.
“Officers attended the location and conducted enquiries.
“The death is not believed to be suspicious.
“A report will be prepared for the coroner.”