The flag was officially adopted on 17 February 1950,[1] and it consists of a fimbrated green cross surrounded by two red and two blue quarters.

It is no coincidence that Groningen's city colours form a cross at the heart of the flag.

In fact, that placement in the centre symbolizes the central location of the city of Groningen in the province.

In the year 1913 Van der Laars did a proposal to use a flag for the province of Groningen.

The blue stripe in the middle was altered to the green of the flag from the city of Groningen.