Rochester is a city in Olmste County, Minnesota, United States. The city was estimated to have population of 96,975 as of July 1, 2006, making it Minnesota's third-largest city and the largest outside the Minneapolis-St. Paul-Bloomington Metropolitan Statistical Area. It is perhaps best known as the home of the Mayo Clinic. The city is also home to one of IBM's largest facilities. The city has long been a fixture on Money magazine's "Best Places to Live" index, and is ranked number 67 on the 2006 list.