LTSR may refer to:
*
London, Tilbury and Southend Railway
The London, Tilbury and Southend Railway (LT&SR), was a British railway company, whose network connected Fenchurch Street station, in central London, with destinations in east London and Essex, including , , , Tilbury, Southend and . The company ...
, a railway line from London to Southend in England.
*''LTS Rail'', a post-privatisation train operating company, later renamed
.
*The
Lithuanian Soviet Socialist Republic (in
Lithuanian: ''Lietuvos Tarybų Socialistinė Respublika'').
*
Lone Tree Scout Reservation
* Long-Term Service Release - infrequent updates to supplied software, with only essential low-risk changes, that gives minimum disruption to organisations that don't want the effort, cost and risk of frequent updates.
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