This is a collection of lists of flags, including the flags of states or territories, groups or movements and individual people. There are also lists of historical flags and military flag galleries. Many of the flag images are on Wikimedia Commons.

• Gallery of sovereign state flags
• List of country subdivision flags
• Lists of city flags
• List of flags by design
• List of national flags by design
• List of national flags by aspect ratio
• List of flags by color
• List of flags by number of colors
• List of flags by color combination

• Gallery of flags of dependent territories
• Timeline of national flags
• International maritime signal flags
• Lists of naval flags

• Gallery of flags by design
• Category:Flags
• Index of country subdivisions
• Index of historical flags by year

• Flags of the World (FOTW)
• Vexilla Mundi - National and Regional Flags
• Cyber-flag (french site)
• North American Vexillological Association
• List of Flags in the Flags of the World Database
• The World All Countries National Flags
• Interactive Flag Designs Flag Designs using evolutionary algorithms and search world flags using image similarity
• Car Flag Design
• CIA World Factbook
• Extensive list of similar flags from around the world
• A blog with animated GIF flags

This article includes a list of lists.