Garcia finished at 27-under 257, breaking the previous record of 258 set by David Llewellyn at the 1988 ARF Biarritz Open and equaled in 1990 by Ian Woosnam at the Torras Monte Carlo Open.
The Spaniard's performance -- his first victory in nearly three years -- also tied the mark for the second-lowest score to par in tour history.
He finished 11 shots ahead of Gonzalo Fernandez-Castano, who had flirted with a 59 but ended up settling for a 7-under 64.
Aaron Carter is still in love with Hilary Duff
Millions of Getty images now available for free via embed tool