Nathan Tennyson Adcock (born 22 April 1978 in Campbelltown) is an Australian cricketer who played for the Southern Redbacks. He attended St. Peter's College, an all-boys high school in Adelaide, South Australia from 1991 to 1995, qualifying for St. Peter's inter-collegiate "First XI" cricket squad at age 15, a level usually not attained until age 16 or 17 by boys in Years 11 and 12.
On 28 August 2007 Adcock was surprisingly named captain of the Southern Redbacks for the 2007–08 domestic season, despite not previously being regarded as a player certain of a spot in the team.