Lakeland is a city in Polk County, Florida, United States, located approximately midway between Tampa and Orlando along Interstate 4. According to the 2006 U.S. Census Bureau estimate, the city had a population of 89,108. Lakeland is a principal city of the Lakeland-Winter Haven, Florida Metropolitan Statistical Area, which had an estimated population of 561,606 in July, 2006. It is twinned with Richmond Hill, Ontario.