Fetching details from the dictionary...

prefecture (of Japan); county (of China, Taiwan, Norway, etc.); department (of France); province (of Italy, Spain, etc.)
「県」 has another reading with different meanings.
私は千葉県で生まれて育ちました。
I was born and raised in Chiba Prefecture.
来月は北海道から九州まで各県を回る。
Next month I'll tour various prefectures from Hokkaido to Kyushu.
この県は自然が豊かで観光地も多い。
This prefecture is rich in nature and has many tourist spots.