The post box at Castlegate Post Office in Aberdeen, Scotland has been painted gold to celebrate Grainger’s gold medal with Anna Watkins in the Olympic rowing women’s double scull race.
The 36-year-old rower has had to wait for over a decade to win her first gold having settled for silver in Sydney, Athens and most recently Beijing.
Speaking after the race she said: “It was worth the wait. Steve [Redgrave] promised me there would be tears of joy this time and there are.
“For both of us, we knew we had the goods to perform and it was about delivering today. There’s just that satisfaction of a job well done.
“I feel this medal, of all of them, is the people’s medal. I feel so many people have been behind me and supported me.”
The Royal Mail has also produced special gold medal stamps which feature an image of Grainger and Watkins on the podium with their medals.
The organisation will be painting one of its red post-boxes gold to celebrate every Team GB and ParalympicsGB gold medal win during the London 2012 Olympic Games and Paralympic Games.
Grainger was born in Glasgow but her family later moved to Aberdeen.
Aberdeenshire already has one gold post box after Tim Baillie’s victory with Etienne Stott in the two man canoe slalom on Thursday.
The gold boxes will remain in use and customers will be able to post mail in them as normal.
Many of the first UK post-boxes were painted green to blend in with the landscape but the colour red was introduced in 1874 to make them more visible to the public.