Objective To investigate the species distribution, population density, breeding habits and seasonal fluctuation of mosquitoes in Ningde, providing the basis for prevention of insect-borne diseases. Methods The investigation was conducted in compliance with the mosquito species investigation program set forth by the Fujian Provincial Center for Disease Control and Prevention. Results Mosquitoes of 47 species, 9 genera were captured from such breeding places as rice fields, rivers, water pits, bamboo zones, sewers, discarded cans and tires in Ningde. The predominant species in residential areas were Culex tritaeniorhynchus, Cx. pipiens quinquefasciatus, Anopheles sinensis and Armigeres subalbatus. The density of adult mosquitoes averaged 27.67 per labor-hour and peaked in July with a maximum of 92.00 per labor-hour. The predominant species was Cx. tritaeniorhynchus. Conclusion The species distribution, density of adult mosquitoes in residential areas and seasonal dynamics were identified in Ningde.