The following is a list of flags of Sweden.
National flag and state flag
Royal standards
Military flags
Flags of the Navy
Historical flags
Party flags
Party flags
Regional flags
Each official flag is based on the coat of arms for the county, see gallery, and used on buildings etc. used by respective county administration. Unofficial flags are used by private and local people.
Swedish municipals often use flags that simply are the actual coat of arms transferred into a flag. See List of municipalities of Sweden where you can see the arms and links to each municipal.