Hillsborough County

Administrative district of west-central Florida; area 2,727 sq km/1,053 sq mi, population (1990) 834,100. Hillsborough County is situated on Hillsborough, Old Tampa, and Tampa bays. Its seat and largest city is Tampa.

The west of the Hillsborough County is dominated by Tampa and the bays, with shipping, some industry and business, tourism, fishing, and shrimping all being important economic activities. The remainder is largely agricultural, including its only other large municipality, Plant City (in the northeast). Farm produce includes citrus fruits, berries and vegetables, dairy goods, and poultry. The county contains numerous lakes, and there is some forestry and phosphate mining, particularly in the north.

Hillsborough County

Administrative district of southern New Hampshire, with its seat at Manchester; area 2,269 sq km/876 sq mi, population (1990) 336,100. A leading industrial county, Hillsborough produces shoes, textiles, wood products, paper, tools, and machinery.

Hillsborough County has granite quarries, lumbering operations, resorts, and dairy, poultry, and livestock farms. The Contoocook, Piscataquog, Souhegan, Merrimack, and Nashua rivers supply water and hydroelectric power. Hillsborough is New Hampshire's most populous county, being home to almost a third of the state's residents.