The complete list of countries whose nationals will not need a visa to enter Mongolia for stays of up to 30 days (from January 2023 to end of 2025): 

Argentina

Australia

Austria

Belarus

Belgium 

Brazil

Bulgaria 

Canada

Chile

Croatia

Cyprus

Czech Republic

Denmark 

Ecuador

Estonia

Finland

France 

Germany

Greece

Hongkong Sar, China

Hungary 

Iceland

Ireland 

Israel

Italy

Japan

Kazakhstan

Kyrgyzstan

Lao People'S Democratic Republic

Latvia 

Liechtenstein 

Lithuania

Luxembourg 

Macao Sar, China

Malaysia

Malta 

Martinique

Monaco

Netherlands 

New Zealand

Norway 

Peru

Poland 

Portugal 

Republic Of Korea

Romania

Russian Federation

Serbia

Singapore

Slovakia

Slovenia 

Spain

Sweden 

Switzerland 

Thailand

Türkiye

UK and Northern Ireland 

Ukraine

United States Of America

Uruguay

Uzbekistan