Timothy John Armstrong (born 26 September 1990) is an Australian cricketer and successful mining businessman formerly contracted to the Perth Scorchers in the Big Bash League, having previously played at Australian domestic level with New South Wales, the Sydney Thunder, and Western Australia. From Dubbo, New South Wales, Armstrong was from a strong cricketing family, and going on to represent the Australian under-19 cricket team at both Test and One Day International level.