You can cancel your OkCupid account in easy steps.
First, visit http://www.okcupid.com/settings?show_delete_page=1 and log in to your account.
Second, re-enter your password to confirm your decision.
Third, click “Delete Account” to delete it, or “Disable Account” to disable it. Deleting your account permanently cancels it, but if you choose to disable your account, you can log back in at any time using your account credentials.