A system to rank hotels based on the quality of facility and service. The star ratings are 1 through 5 with a five start hotel being the best, or a luxury hotel.

There is no unified international standard with consistent parameters from which to define each star rating. What constitutes a four-star hotel may differ among cities and countries. European hotels generally rank from one to four stars, meaning that a four-star hotel in London can be significantly better than a four-star hotel in a US city.