Ninghai County is a county located in the eastern part of Zhejiang province, China. It operates under the administration of Ningbo and encompasses a land area of 1,712.50 km² (661.20 sq mi) along with a sea area of 213.35 km² (82.37 sq mi).
The county features a coastline measuring 173.86 km (108.03 mi). Its administrative structure includes four sub-districts, 11 towns, and three townships, with a total population of approximately 682,000 residents.