In addition, to celebrate the 100th anniversary of the World Cup, three South America countries, Uruguay, Argentina and Paraguay, will stage their first group stage matches at home.
This means that the 2030 World Cup will be staged across six countries in three different continents.
Uruguay were the first World Cup hosts in 1930.
FIFA president Gianni Infantino said: "The FIFA Council agreed unanimously that the only bid to host the 2030 World Cup will be the joint bid of Morocco, Portugal and Spain.
"Two continents — Africa and Europe — united not only in a celebration of football but also in providing unique social and cultural cohesion. What a great message of peace, tolerance and inclusion.
"In 2030, we will have a unique global footprint. Three continents — Africa, Europe and South America — and six countries — Argentina, Morocco, Paraguay, Portugal, Spain and Uruguay — welcoming and uniting the world while celebrating together the beautiful game, the centenary and the FIFA World Cup."
The United States of America, Canada and Mexico will host the next edition of the FIFA World Cup in 2026.
