Category:Populated places established in 1820
|Instance of||Wikimedia category|
|Category combines topics||1820|
|Instance of||calendar year,|
leap year starting on Saturday and ending on Sunday
|Point in time||1820|
|Populated places established in the 1820s:||← 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 →|
Populated places (including cities, towns and villages) established (ie first settled or otherwise came into existence) in the year 1820.
Where reliable foundation dates exist, articles should be categorised by year for 1500 and later, by decade from the 1300s to the 1490s, by century from the 10th century BC to the 13th century and by millennium for the 2nd millennium BC and earlier. Prior to 1500, where greater dating accuracy exists, articles should also be placed in the appropriate Establishments by year category.