SRO may refer to
- Standing room only, an event in which all seats are occupied leaving only places to stand
- Standing Room Only, a number of different works of media
- S.R.O., a 1966 album by Herb Alpert and the Tijuana Brass
- "S.R.O.", a song by Avail from their 1998 album Over the James
- SRO Cinemaserye, a 2009 televised dramatic anthology from the GMA Network in the Philippines
- SRO Records, a Chicago "house music" record company
- Self-regulatory organization, a private entity operating in a government-regulated industry that has responsibility for oversight of its users or members
- Senior Reactor Operator, a supervisory position overseeing the work of the nuclear reactor operators
- Senior Responsible Owner, in Office of Government Commerce terminology in the UK, is the individual responsible for ensuring that a project or programme of change meets its objectives
- Side Roads Order, in the UK a statutory instrument relating to changes to roads
- Silkroad Online, a massively multi-player online role-playing game
- Single room occupancy, in North America, a multiple tenant building that houses one or two people in individual rooms
- Slovenský rozhlas ("SRo"), Slovak radio group
- Stéphane Ratel Organisation, a motorsports organization
- Stéphane Ratel Organisation (SRO Motorsport Group), the organizing body for auto racing within Stéphane Ratel Organization
- Strontium oxide (SrO), an inorganic compound
- s.r.o., in the names of Czech and Slovak businesses, corresponds to "LLC" and reads as společnost s ručením omezeným