There are hundreds of different online internship search engines in the United States that can help you find your ideal internship:
Monster.com
CareerBuilder.com
Indeed.com
LinkedIn.com
InternMatch.com
Vault.com
CollegeGrad.com/internships
Ihipo.com/internships
CareerRookie.com
InternJobs.com
InternWeb.com
InternQueen.com
Nationjob.com
Simplyhired.com
Juju.com
Job-hunt.org
JobBankUSA.com
Job.com
CareerSite.com
Financial Job Network
AccountingJobsToday.com
Efinancialcareers.com
Idealist.org
Coolworks.com