| | Healthcare Industry | Medicaid What was the estimated world population on January 15th 2008? The estimated world population on January 15th, 2008, was approximately 6.721 billion people, according to the U.S. Census Bureau's World Population Clock. Medicaid - Related Articles Information About the Medicaid Enhanced Benefits Program How to Get a Temporary Medicaid Card Rules for Medicaid in Illinois How to Apply for SSI and Medicaid Delaware Medicaid Requirements SSI & Medicaid Eligibility How to Apply for Medicaid Benefits