The tallest dog living (male) is 1.007 m (3 ft 3 in), achieved by Reginald “Reggie” Johnson Reiss (USA), in Idaho Falls, Idaho, USA, as of 27 January 2025. ---------------------------------------------------------------------------------------------- At Guinness World Records we want to show that everyone in the world is the best at something, and we’re here to measure it! Whether you’ve got the stretchiest skin, know the world’s smallest dog or want to create the largest human dominoes chain