| Year | Laureate (birth/death) | Country | Rationale |
| 1901 | | Henry Dunant(1828–1910) | Switzerland | "for his humanitarian efforts to help wounded soldiers and create international understanding" |
| | Frédéric Passy(1822–1912) | France | "for his lifelong work for international peace conferences, diplomacy and arbitration." |
| 1902 | | Élie Ducommun(1833–1906) | Switzerland | "for his untiring and skilful directorship of the Bern Peace Bureau" |
| | Charles Albert Gobat(1843–1914) | "for his eminently practical administration of the Inter-Parliamentary Union." |
| 1903 | | William Randal Cremer(1828–1908) | United Kingdom | "for his longstanding and devoted effort in favour of the ideas of peace and arbitration." |
| 1904 | | Institute of International Law(founded 1873) | Belgium | "for its striving in public law to develop peaceful ties between nations and to make the laws of war more humane." |
| 1905 | | Bertha von Suttner(1843–1914) | Austria-Hungary | "for her audacity to oppose the horrors of war." |
| 1906 | | Theodore Roosevelt(1858–1919) | United States | "for his role in bringing to an end the bloody war recently waged between two of the world's great powers, Japan and Russia." |
| 1907 | | Ernesto Teodoro Moneta(1833–1918) | Italy | "for his work in the press and in peace meetings, both public and private, for an understanding between France and Italy" |
| | Louis Renault(1843–1918) | France | "for his decisive influence upon the conduct and outcome of the Hague and Geneva Conferences." |
| 1908 | | Klas Pontus Arnoldson(1844–1916) | Sweden | "for their long time work for the cause of peace as politicians, peace society leaders, orators and authors." |
| | Fredrik Bajer(1837–1922) | Denmark |
| 1909 | | Auguste Beernaert(1829–1912) | Belgium | "for their prominent position in the international movement for peace and arbitration." |
| | Paul Henri d'Estournelles de Constant(1852–1924) | France |
| 1910 | | Permanent International Peace Bureau(founded 1891) | Switzerland | "for acting as a link between the peace societies of the various countries, and helping them to organize the world rallies of the international peace movement." |
| 1911 | | Tobias Asser(1838–1913) | Netherlands | "for his role as co-founder of the Institut de droit international, initiator of the Conferences on International Private Law (Conférences de Droit international privé) at the Hague, and pioneer in the field of international legal relations" |
| | Alfred Fried(1864–1921) | Austria-Hungary | "for his effort to expose and fight what he considers to be the main cause of war, namely, the anarchy in international relations." |
| 1912 | | Elihu Root [A](1845–1937) | United States | "for bringing about better understanding between the countries of North and South America and initiating important arbitration agreements between the United States and other countries." |
| 1913 | | Henri La Fontaine(1854–1943) | Belgium | "for his unparalleled contribution to the organization of peaceful internationalism." |
| 1914 | Not awarded due to World War I. |
| 1915 |
| 1916 |
| 1917 | | International Committee of the Red Cross(founded 1863) | Switzerland | "for the efforts to take care of wounded soldiers and prisoners of war and their families." |
| 1918 | Not awarded due to World War I. |
| 1919 | | Woodrow Wilson[A](1856–1924) | United States | "for his role as founder of the League of Nations." |
| 1920 | | Léon Bourgeois(1851–1925) | France | "for his longstanding contribution to the cause of peace and justice and his prominent role in the establishment of the League of Nations." |
| 1921 | | Hjalmar Branting(1860–1925) | Sweden | "for their lifelong contributions to the cause of peace and organized internationalism." |
| | Christian Lange(1869–1938) | Norway |
| 1922 | | Fridtjof Nansen(1861–1930) | Norway | "for his leading role in the repatriation of prisoners of war, in international relief work and as the League of Nations' High Commissioner for refugees." |
| 1923 | Not awarded |
| 1924 |
| 1925 | | Sir Austen Chamberlain[A](1863–1937) | United Kingdom | "for his crucial role in bringing about the Locarno Treaty." |
| | Charles G. Dawes[A](1865–1951) | United States | "for his crucial role in bringing about the Dawes Plan." |
| 1926 | | Aristide Briand(1862–1932) | France | "for their crucial role in bringing about the Locarno Treaty." |
| | Gustav Stresemann(1878–1929) | Germany |
| 1927 | | Ferdinand Buisson(1841–1932) | France | "for their contribution to the emergence in France and Germany of a public opinion which favours peaceful international cooperation." |
| | Ludwig Quidde(1858–1941) | Germany |
| 1928 | Not awarded |
| 1929 | | Frank Billings Kellogg[A](1856–1937) | United States | "for his crucial role in bringing about the Kellogg-Briand Pact." |
| 1930 | | Nathan Söderblom(1866–1931) | Sweden | "for promoting Christian unity and helping create 'that new attitude of mind which is necessary if peace between nations is to become reality'." |
| 1931 | | Jane Addams(1860–1935) | United States | "for their assiduous effort to revive the ideal of peace and to rekindle the spirit of peace in their own nation and in the whole of mankind." |
| | Nicholas Murray Butler(1862–1947) | United States |
| 1932 | Not awarded |
| 1933 | | Sir Norman Angell[A](1872–1967) | United Kingdom | "for having exposed by his pen the illusion of war and presented a convincing plea for international cooperation and peace." |
| 1934 | | Arthur Henderson(1863–1935) | United Kingdom | "for his untiring struggle and his courageous efforts as Chairman of the League of Nations Disarmament Conference 1931-34." |
| 1935 | | Carl von Ossietzky[A][B](1889–1938) | Germany | "for his burning love for freedom of thought and expression and his valuable contribution to the cause of peace." |
| 1936 | | Carlos Saavedra Lamas(1878–1959) | Argentina | "for his role as father of the Argentine Antiwar Pact of 1933, which he also used as a means to mediate peace between Paraguay and Bolivia in 1935." |
| 1937 | | The Viscount Cecil of Chelwood(1864–1958) | United Kingdom | "for his tireless effort in support of the League of Nations, disarmament and peace." |
| 1938 | | Nansen International Office for Refugees(1930–1939) | League of Nations | "for having carried on the work of Fridtjof Nansen to the benefit of refugees across Europe." |
