The train company serving Brighton, Hove and Portslade said that crime across its network had fallen by 7.2 per cent over the past year.
Southern cited figures compiled by the British Transport Police covering reported crime on trains, railway lines and at railway stations.
The number of crimes reported to the BTP fell from 3,492 in the year to last April to 3,242 in the year to this month.
The latest figure is 900 down on the 2008-09 figure, Southern said, and represents a 33 per cent reduction compared with 2006-07.
Southern said that theft, criminal damage and property crime accounted for 53 per cent of the total number of offences.
Crimes against the person accounted for 14 per cent of the total and public order offences, which include anti-social behaviour, accounted for 20 per cent.
The company said that, with 162 million passenger journeys a year, one crime was committed in every 50,000 journeys on the Southern network.
It added: “The chances are reduced even further when crimes such as vandalism, trespass, drug and fraud offences are taken into consideration.”
Southern’s head of revenue protection and security Martin Grier said: “This is great news for our passengers and colleagues at Southern.
“We have worked extremely hard alongside British Transport Police to prevent, detect and deal with crime on our network.
“The fall in figures shows without doubt that the measures we have in place and the activities of our Safer Travel Teams are really making a difference.”
