It is impossible to say for the ancient Olympics.
For the modern Olympics you need to state what distance.
Adebe Bekila in Rome in 1960
No one, Ethiopia has never won a gold at the olympics.
latvian cyclist won the first medal in olympics 2012
Greece, but the USA won the most gold medals.
Running was a part of the first ancient Olympics in Olympia, Greece, in 776 BC. They had several different foot races in those first Olympic Games. See the Related Link.
USA have won the Olympics.
Usain Bolt
Adebe Bekila in Rome in 1960
Greece was the country that started the olympics so they won in the first olympics.
Usain Bolt won the 100m final at Beijing
The first winners of the Olympics won an olive wreaths or crowns.
Greece was the country that started the Olympics so they won in the first olympics.
No one, Ethiopia has never won a gold at the olympics.
The first Olympic Champion of the Modern Olympics was James Connolly (USA) who won the inaugural Men's Triple Jump.
In the Ancient Greece.
Spain, According to another answered question on this site. "What country has won the most Olympic medals in running?" Answered: Spain
usa