'''STR''', '''StR''', '''Str''' or '''str''' may refer to:
== Organizations ==
*Scuderia Toro Rosso, a Formula One motor racing team *Séminaire Saint-Joseph de Trois-Rivières, a school in Quebec *South Tynedale Railway, an English heritage railway *Specialized Technology Resources, an American corporation *STR, Inc hotel industry data company, formerly Smith Travel Research *Stranraer Harbour railway station code *Stuttgart Airport, Germany, IATA code
== Science, medicine, and technology ==
* Short tandem repeat or microsatellite, in a genome * Special Theory of Relativity * Specialty registrar (StR), UK medical title * Suspend to RAM, S3 power state in computing * Synchronous transmit-receive, an IBM communications protocol * Jaguar STR, a car * Sort-Tile-Recursive, bulk-loading method for an R-Tree data structure * str or STR, term for character string or function in some programming languages, see Comparison of programming languages (string functions) * Swedish Twin Registry, a registry of twins in Sweden established in 1961 * Steps to reproduce, a sequence of actions that will reproduce a problem, typically used in debugging software
== Other == * Short-term rental, accommodation rented for short periods of time * Silambarasan (born 1983), an Indian actor and film producer also known as Silambarasan Thesingu Rajendar or STR * Suspicious Transaction Report by a financial institution * .str, a video file included in a PlayStation (PS1) video game and contains a cinematic played in the game * Abbreviation for Strength
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