PastlasHistorical atlas

Decade · 1820 – 1829

The world in the 1820s

From 1820 to 1829 the atlas holds 561 states standing at some time. 153 things began - Mexico, Peru and Uruguay among them - and 62 ended; 333 people were born and 218 died, 1 of all these dated only to the decade.

Its years

The years of the decade with a page of their own: ten or more things dated to the year.

1820: 14 began — 3 wars and battles, 2 risings, regime changes and massacres, 9 other18201821: 25 began — 10 wars and battles, 3 risings, regime changes and massacres, 12 other18211822: 18 began — 9 wars and battles, 2 risings, regime changes and massacres, 7 other18221823: 15 began — 6 wars and battles, 2 risings, regime changes and massacres, 7 other18231824: 16 began — 9 wars and battles, 1 risings, regime changes and massacres, 6 other18241825: 19 began — 5 wars and battles, 1 risings, regime changes and massacres, 13 other18251826: 18 began — 4 wars and battles, 2 risings, regime changes and massacres, 12 other18261827: 11 began — 6 wars and battles, 1 risings, regime changes and massacres, 4 other18271828: 10 began — 4 wars and battles, 0 risings, regime changes and massacres, 6 other18281829: 6 began — 2 wars and battles, 1 risings, regime changes and massacres, 3 other1829

What began in the 1820s

By kind, the best known first.

States 37

  • Mexico · state · 1821 – present
  • Peru · state · 1822 – present
  • Uruguay · state · 1825 – present
  • Bolivia · state · 1825 – present
  • Costa Rica · state · 1821 – present
  • Honduras · state · 1821 – present
  • Liberia · state · 1822 – present
  • Nicaragua · state · 1821 – present

and 29 more in the atlas.

Wars and battles 58

and 50 more in the atlas.

Regime change 2

Unrest and atrocity 14

and 6 more in the atlas.

Famine and plague 2

Natural disasters 2

Treaties 14

and 6 more in the atlas.

Works and ideas 24

and 16 more in the atlas.

What ended in the 1820s

States 36

and 28 more in the atlas.

Wars and battles 21

and 13 more in the atlas.

Unrest and atrocity 3

Famine and plague 1

Treaties 1

Born and died

Born 333

and 317 more in the atlas.

Died 218

and 202 more in the atlas.

States of the 1820s

The states that stood at some time in the 1820s, by region, the best known first, with who held the highest office in 1820.

Europe: 134 statesEurope134Middle East and North Africa: 70 statesMiddle East and North Africa70Sub-Saharan Africa: 46 statesSub-Saharan Africa46South Asia: 168 statesSouth Asia168East and Southeast Asia: 72 statesEast and Southeast Asia72Americas and Oceania: 43 statesAmericas and Oceania43Location unknown: 28 statesLocation unknown28

Europe134 states

and 126 more; every state of Europe.

Middle East and North Africa70 states

and 62 more; every state of Middle East and North Africa.

Sub-Saharan Africa46 states

and 38 more; every state of Sub-Saharan Africa.

South Asia168 states

and 160 more; every state of South Asia.

East and Southeast Asia72 states

and 64 more; every state of East and Southeast Asia.

Americas and Oceania43 states

and 35 more; every state of Americas and Oceania.

Location unknown28 states

and 20 more; every state of Location unknown.

Open in the atlas

  • On the timeline, 1800 – 1849: every state, war and life of the 1820s, region by region.
  • On the map in 1825: the borders of the year, its cities under their names of the year, and what happened where.

Wikidata (CC0) · data built 2026-10-07 · Pastlas v2.13.1, by Oleh Voronko. The published atlas and its data are for non-commercial use.