- Sapphires Model Management - Agency located in Wolverhampton, UK.
- Scoop Models - Copenhagen agency representing models, athletes and entertainers.
- Seattle Models Guild - Founded in 1978, SMG is the oldest modeling agency in the Northwest United States.
- Seduva Modelos - Agency in Mexico City.
- seeDS.management - Berlin agency. Site in German and English.
- Slides - Agency based in Paris. Site in French and English.
- Sport Models - Paris agency specializing in sports and body models. Site in French and English.
- SPS Model Management - Agency in Amsterdam. Site mostly in English, with some content in Dutch.
- SS&M Model Management - Agency with offices in Barcelona and Madrid. Site in Spanish and English.
- Star Marketing & Modeling Agency - Online agency based in Connecticut, founded by former model Yanick Pelerin.
- Stars Model Agency - Offices in Madrid.
- Starz People - Modeling and talent agency with offices in Hong Kong and Shanghai. In English and Chinese.
- Stella Models - Model and talent agency in Vienna. In English, with some sections available in German.
- Storm Models - Agency with offices in London and Cape Town.
- Success Model Management - Agency with offices in Paris and Marseille. Site in French and English.
- Super Model Launchers - Agency in New Delhi which trains and promotes aspiring Indian male, female and child models, actors, singers, composers, and fashion photographers.
- Surazuri Model Management - Agency in Nairobi, Kenya.
- Sybille Sasse - Agency in Montreal, in business since 1957, representing models, actors and voice talent. Site in French and English.