The 2012 Monte-Carlo Rolex Masters was a men's tennis tournament for male professional players, played from 16 April through 22 April 2012, on outdoor clay courts.

It was the 106th edition of the annual Monte Carlo Masters tournament, which was sponsored by Rolex for the fourth time.

Second-seeded Rafael Nadal won the singles title.

[3] The following players received wildcards into the main draw: The following players received entry via qualifying: The following pairs received wildcards into the doubles main draw: The following pairs received entry as alternates: Bob Bryan / Mike Bryan defeated Max Mirnyi / Daniel Nestor, 6–2, 6–3

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