Magazine Cartoon Markets
Many markets will accept email submissions but some prefer submissions by regular mail or through a program such as Submittable. To find information about all markets I suggest you subscribe to Gag Recap or purchase the annual Artists & Graphic Designers Market directory. Another good reason to subscribe to Gag Recap is because this publication describes actual cartoons each publication is buying. This gives you a better idea of what they are seeking.
I suggest you also sign up for my free email newsletter since new markets I uncover will be announced in that email. You can unsubscribe at any time.
Markets Which Accept Submissions by Email
The following markets accept cartoon submissions by email. To submit, click on the market that interests you. The page will open up a simple form for you to complete. Just fill in your name and email address, and then attach up to 5 files. Since these are for printed publications the files you upload should be saved at 300 dpi resolution, preferably as jpeg files. Then click on the submit button. The email will go out addressed to the proper cartoon editor with a short cover statement. This is a very quick way to submit and should save cartoonists a lot of time. Be sure to keep a record somewhere of which cartoons you submitted to each market so you won't duplicate yourself later on.
In Gag Recap you will find plenty of good cartoon markets which require submissions by mail or Submittable. These include such publications as Boys Life, The New Yorker, Dakota Country, the Wall Street Journal, and more.