Which country invented the clocks first?

Egypt

Egypt may have created the first devices that regularly marked the passage of time, like the sand-filled hourglass. But around that same time, Ancient Greece developed a water clock that dripped out a specific amount of water at a specific rate of speed (or lack of speed). As the level of water dropped, markings on the inside of the container showed the passing of time. History has not recorded specifically who made what first!

The first mechanical clocks using gearworks were made in the Black Forest region of Germany around 1550-1575.