Member states of the Union of South American Nations

Flag	Country	Capital	Area (km2)	Population	Density (/km2)	Currency	GDP per cap. (PPP)[4]	Gini	HDI	Official, National, & Recognized languages
	Bolivia Estado Plurinacional de Bolivia Bulivya Mamallaqta Wuliwya Suyu	Sucre La Paz	1,098,581	9,119,152	8.9/km2	Bolivian boliviano	4,575[5]	57.2[6]	0.663[7]	Spanish Quechua Aymara and 34 others also see Languages of Bolivia
	Guyana Co-operative Republic of Guyana	Georgetown	214,999	858,863	3.502/km2	Guyanese dollar	7,004[5]	43.2[6]	0.633[7]	English Guyanese Creole 11 other languages also see Languages of Guyana
	Suriname Republiek Suriname	Paramaribo	163,821	470,784	2.9/km2	Surinamese dollar	8,947[5]	41.5[6]	0.680[7]	Dutch also see Languages of Suriname
	Venezuela República Bolivariana de Venezuela	Caracas	916,445	28,199,822	30.2/km2	Venezuelan bolívar	11,726[5]	49.5[6]	0.735[7]	Spanish all other indigenous languages also see Languages of Venezuela

Six member states suspended their participation in the organization in April 2018.^{[8][9][10][11]}

Flag	Country	Capital	Area (km2)	Population	Density (/km2)	Currency	GDP per cap. (PPP)[4]	Gini	HDI	Official, National, & Recognized languages
	Argentina República Argentina	Buenos Aires	2,780,403	43,417,000	14.49/km2	Argentine peso	15,030[5]	48.8[6]	0.797[7]	Spanish (de facto) also see Languages of Argentina for other Co-official languages
	Brazil República Federativa do Brasil	Brasília	8,514,877	204,451,000	22/km2	Brazilian real	11,065[5]	55.0[6]	0.718[7]	Portuguese Brazilian Sign Language also see Languages of Brazil for other Co-official languages
	Chile República de Chile	Santiago	756,950	16,763,470	22/km2	Chilean peso	14,939[5]	52.0[6]	0.805[7]	Spanish (de facto) also see Languages of Chile
	Colombia República de Colombia	Bogotá	1,141,748	48,219,827	40/km2	Colombian peso	9,091[5]	58.5[6]	0.710[7]	Spanish 68 other languages/dialects also see Languages of Colombia
	Ecuador República del Ecuador	Quito	256,370	13,922,000	53.8/km2	Ecuadorian centavo United States dollar	8,021[5]	54.4[6]	0.720[7]	Spanish also see Languages of Ecuador
	Paraguay República del Paraguay Tetã Paraguái	Asunción	406,752	6,158,000	15.6/km2	Paraguayan guaraní	4,710[5]	53.2[6]	0.665[7]	Spanish Guaraní also see Languages of Paraguay
	Peru República del Perú Piruw Ripuwlika Piruw Suyu	Lima	1,285,220	29,180,900	23/km2	Peruvian sol	9,107[5]	50.5[6]	0.725[7]	Spanish Quechuan Aymara all other indigenous languages also see Languages of Peru
	Uruguay República Oriental del Uruguay	Montevideo	176,215	3,477,779	19.8/km2	Uruguayan peso	13,961[5]	47.1[6]	0.783[7]	Spanish also see Languages of Uruguay

On 28 August 2018, Colombian president Iván Duque announced that foreign minister Carlos Holmes had officially notified Unasur of their intention to leave the bloc, effective in 6 months, denouncing it as an institution created by Hugo Chávez to sideline existing international treaties and referring to it as an accomplice to what they referred to as the dictatorship in Venezuela.^[12][13] Ecuador announced its withdrawal on 13 March 2019.^[14] Uruguay followed suit in March 2020.^[3] Following the 2022 Brazilian general election, newly elected president Luiz Inácio Lula da Silva signalled his intention to rejoin UNASUR.^[15] Brazil rejoined on 5 May 2023.^[16]