According to our records, this business is located in Hayward (in Alameda County), California 94541, the location GPS coordinates are: 37.6688205 (latitude), -122.0807964 (longitude). Colonial Supplemental Ins is categorized under Insurance Companies (SIC code 6411). Current estimates show that the unit has a sales volume of $552,000 and staff of approximately 4 people. You can contact the company by phone at (510) 745-9350.