Village of Winthrop Harbor
- Official Village Web site providing contact information, village ordinances, history and demographics.
- http://www.winthropharbor.com/

United Methodist Church
- Schedule of worship services, women's ministry and a history of the church.
- http://www.winthropharborumc.org/

Winthrop Harbor Police Department
- Detailed information about the department, law enforcement, crime prevention and related resources available on-line
- http://www.whpd.org/

Sandpiper Inn
- Located near North Point Marina and Illinois Beach State Park, just minutes away from Lake Michigan.
- http://www.sandpiperinnmotel.com/

Winthrop Harbor Lions Club
- Lions Club of District 1F of Illinois helps support a number of local youth programs, including the Boy Scouts, Cub Scouts, Girl Scouts, school programs, and other recreational programs.
- http://www.winthropharborlionsclub.org/

Alexander's Auto Care
- Sells multi brand tires and wheels, and offers complete automotive service and repair.
- http://alexandersautocare.com

Becker's Landscaping Service
- Lawncare and landscaping services for homeowners and businesses in Northeastern Illinois and Southeastern Wisconsin.
- http://www.beckerslandscaping.com

Harbor Animal Hospital
- Full service veterinary hospital, providing a wide range of feline and canine treatments utilizing the latest technologies.
- http://www.harboranimal.com/