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METHODOLOGY: For the NLJ 350 survey of the nation's largest law firms, lawyer totals are based on the average number of full-time equivalent attorneys for the period Jan. 1 to Dec. 31, 2011. The National Law Journal sent surveys to hundreds of law firms to determine the 350 largest. Lawyer counts do not include contract or temporary attorneys. A firm must have more lawyers based in the United States than in any other single country to be included on the list. Firms are ranked by the number of full-time equivalent attorneys, rather than headcount. Numbers are rounded to the nearest whole number. In case of a tie, we rank firms by the actual number of attorneys before rounding. If the tie persists, we rank firms by the total number of partners.