Highland City is a census-designated place in Polk County, Florida, United States. The population was 2,051 at the 2000 census. It is part of the Lakeland–Winter Haven Metropolitan Statistical Area. The modern-day area of Highland City was the site of the United States Army's Fort Fraser, established in 1837 during its war with the Seminole Indians. Zachar…Highland City is a census-designated place in Polk County, Florida, United States. The population was 2,051 at the 2000 census. It is part of the Lakeland–Winter Haven Metropolitan Statistical Area. The modern-day area of Highland City was the site of the United States Army's Fort Fraser, established in 1837 during its war with the Seminole Indians. Zachary Taylor, former U.S. President, commanded the fort for a short period. Fort Fraser was abandoned shortly after its construction.