Santiago Estebán Mesón (born 25 January 1968 in San Miguel de Tucumán) is a former Argentine rugby union player.

Méson started his career at Tucumán Rugby Club, in 1976/77, joining the first category in 1985/86.

Méson had 34 caps for Argentina, from 1987 to 1997, scoring 8 tries, 68 conversions, 63 penalties and 1 drop goal, in an aggregate of 365 points.

He was called for the 1991 Rugby World Cup, playing in a single game, without scoring, and for the 1995 Rugby World Cup, but never leaving the bench.

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