This site is the official homepage for the United States’ Olympic Team. It features all sorts of information on every single US team and member for all the sports that the US competes in.
This well organized site is mainly divided in 5 sections: athletes, events, sports (divided into summer and winter sports), shop and features. Each section is outstandingly complete. Furthermore, the shop section is so deep it even takes you to a different site (USOlympicShop.com). This site’s archive is truly impressive, featuring records that go back to 1896 (the first Olympic Games event ever celebrated). In case you are looking for something specific, the site includes a useful search tool that will let you scan the entire archive and return the appropriate results (which can be sorted in any way you prefer) within seconds. All the information on this site is categorized with great detail so that you can browse it for the athlete, sport, event or product you seek. 
