Most Dakota County cities were previously townships or unincorporated villages before officially incorporating as cities. Some incorporated as villages first, then became cities in 1974 when all Minnesota villages were switched over to city status. These dates reflect the earliest incorporation dates for Dakota County cities or villages.

Hastings1857

Farmington1872

Rosemount1875

Mendota1887

South St. Paul1887

Mendota Heights1956

Sunfish Lake1958

Inver Grove Heights1965

Lakeville1967

Apple Valley1968

Eagan *1972

* Eagan Township was founded in 1860, and the city held a 150th anniversary celebration in 2010 in recognition of the township's beginnings.

Sources: Dakota County Historical Society, city websites