MEXICO CITY, Oct 25 (Reuters) - Walmart's Mexico unit on Wednesday posted a 12.2% year-on-year jump in its third-quarter net profit, driven mainly by stronger sales.

Walmart de Mexico, the biggest retailer in Mexico, posted net profit of 13.63 billion pesos ($782 million).

Quarterly revenue at the chain rose 7.7% from the year-earlier period to reach 213.07 billion pesos, compared to a Refinitiv estimate of 213.5 billion pesos ($782 million).

Earnings before interest, tax, depreciation and amortization (EBITDA) for the quarter rose 8.5% to 23 billion pesos.

($1 = 17.4279 Mexican pesos at end-September) (Reporting by Valentine Hilaire and Aida Pelaez Fernandez; Editing by Brendan O'Boyle)