Solvay is a village located in Onondaga County, New York. USA. According to the 2000 census, the village had a total population of 6,845. The village is named after the Solvay brothers, Belgian inventors of the chemical process employed by the Solvay Process Company, formerly the major industry of the village. Solvay apartments for rent comparison page shows most up to date rent information on Solvay apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.