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For some context: according to US News, the most expensive college in the United States (among schools it ranks) with respect to tuition (and fees) is Columbia at ~$55k/year. Below that, there are many schools in the $52--53k/year range.

If you consider the total cost of attendance including room, board, books, and other costs, the estimates for the most expensive schools peak either at $68--72k/year at Columbia or ~$70k/year at Harvey Mudd, followed by at least 40 other schools over $65k/year.

The most expensive in-state tuition at a public college is $16--17k/year. The most expensive (in-state) total cost of attendance are a few schools (like NJIT, William&Mary, and some UC campuses) in the $30--34k/year range.