Depends.  Alaska fishing regulations can be very intimidating and complex.  Here is the summary for fishing licneses:

For Alaska Residents:

• If less than 16 years of age, a fishing license or king stamp is not required, however these fishers will need a free harvest card which can be obtained online (link below) or at any convenience store, sporting good store, grocery store, or most any other merchant in the area.
• If 16 or older but less than 60, a fishing license is required, as is a king stamp if fishing for king salmon.
• If 60 or older, you may qualify for a permanent license (see the Alaska Fish & Game site link below)
• If you are enrolled in certain social programs, you may qualify for a reduced fee for your license

for Non-Residents of Alaska:

• If less than 16 years of age, a fishing license or king stamp is not required, however these fishers will need a free harvest card which can be obtained online (link below) or at any convenience store, sporting good store, grocery store, or most any other merchant in the area.
• If 16 or older a fishing license is required, as is a king stamp if fishing for king salmon.

To purchase your license and/or king stamp online, click HERE to visit the ADF&G License site