The decision enables both places to sell novelty items such as street signs and tourist merchandise. An exchange visit is also planned.
Villagers from Dull first approached the American town with their ideas, but the two places cannot officially pair together due to their difference in size - Dull is a small village while Boring has a population of 12,000.
It was the women's book club of Dull who came up with the idea, causing them to approach the Boring Community Planning Council who then voted in favour of the pairing.
The people of Dull intend to mark the alliance with a new road sign and a celebratory street party on June 23.
Dull's community council chairwoman Marjorie Keddie said: "Extra tourism is the main reason we're doing this, as most of the businesses here are holiday homes and lodges."
Residents from both places think that their partnership will show their sense of humour and prove that although where they live may be Dull and Boring, they are certainly not.
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