Argentina
Hispanic Digital Library (Madrid)
Caras y Caretas (Buenos Aires)
Australia
Trove (National Library of Australia)
Austria
(all Vienna)
Die Bombe
Figaro
Glühlichter
Kikeriki
Die Muskete
Wiener Caricaturen
Brazil
Brazilian Digital National Library
O Malho (Rio de Janeiro)
Czech Republic
Moravian Regional Library
South Bohemian Scientific Library in České Budějovice
(Both are participating members in the Czech Digital Library)
Humoristické listy (Prague)
Kopřivy (Prague)
Rašple (Brno)
Šípy (Prague)
Finland
Tuulispää (Helsinki)
France
(all Paris)
La Caricature
Le Charivari
Le Journal amusant
Le Rire
Le Triboulet
Germany
Fliegende Blätter (Munich)
Der Guckkasten (Munich)
Kladderadatsch (Berlin; also partial coverage via Austrian National Library)
Leuchtkugeln (Munich)
Meggendorfer Blätter (Munich)
Münchener Punsch (Munich)
Simplicissimus (Munich)
Der Wahre Jacob (Hamburg) (also available via Heidelberg)
Great Britain
Hungary
Arcanum Digitheca (subscription required)
(all Budapest)
Bolond Istók
Borsszem Jankó
Kakas Márton
Ludas Matyi
Pesti Izé
Az Ojság
Az Üstökös
Italy
L’Asino (Rome)
Cosmorama pittorico (Milan)
Fasoulin (Pavia)
Il Pasquino Coloniale (São Paulo)
Patapon (Bari)
Pss… Pss… (Bari)
Lo Spirito folletto (Milan)
Latvia
Latvian National Digital Library (Riga)
Svari (Riga)
Netherlands
De Amsterdammer (Amsterdam)
De ware Jacob (Rotterdam)
Other newspapers: Delpher (Dutch National Library)
Norway
Vikingen (Oslo)
Poland
Catholic University Library, Lublin
Warsaw University Library
Kogut (Warsaw)
Kolce (Warsaw)
Mucha (Warsaw)
Szczutek (Lwów)
Portugal
Lisbon Municipal Press Library
A Parodia (Lisbon)
O Século Cómico / Ilustração Portuguesa (Lisbon)
Romania
Central University Digital Library, Cluj
Furnica (Bucharest)
Russia
N. A. Nekrasov Library (Moscow)
Novosibirsk State Regional Scientific Library
Russian State Library (Moscow)
Russian National Electronic Library
State Public Historical Library (Moscow)
Крокодил (Moscow)
Новый Сатирикон (St. Petersburg)
Огонёк (Moscow)
Осколки (St. Petersburg)
Пулемёт (St. Petersburg)
Равлечение (Moscow)
Сатирикон (St. Petersburg)
Чудак (Moscow)
Spain
Hispanic Digital Library (Madrid)
Spanish Virtual Library of Satirical Press (Madrid)
El Busilis (Barcelona)
La Caricatura (Madrid)
La Campana de Gracia (Barcelona)
Don Quijote (Madrid)
La Esquella de la torratxa (Barcelona)
El Fusil (Madrid)
Gedeón (Madrid)
Gil Blas (Madrid)
Madrid cómico (Madrid)
El Motín (Madrid)
El Tío Camorra (Madrid)
La Tomasa (Barcelona)
Sweden
National Library of Sweden, Newspaper Collection
Fäderneslandet (Stockholm)
Switzerland
Swiss Journals Online (ETH)
Nebelspalter (Zurich)
Turkey
Bonn University and Regional Library
Koç University Digital Collections
Karagöz (Istanbul)
Karikatür (Istanbul)
Ukraine
Перець (Kharkiv, Kyiv)
United States
Puck (a searchable collection of high quality images; low-res full issues also available at Hathi Trust)
Sic Transit Pestilentia 