There are a total of 18 states where I-PASS is accepted, including Delaware, Florida, Illinois, Indiana, Kentucky, Maryland, Massachusetts, Minnesota, Nebraska, New Hampshire, New Jersey, New York, North Carolina, Ohio, Pennsylvania, Rhode Island, Virginia, and West Virginia.
The 32 states that do not accept IPass are Alabama, Arkansas, California, Colorado, Connecticut, Delaware, Florida, Georgia, Idaho, Illinois, Indiana, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio.
I-PASS is part of the E-ZPass system and can be used wherever E-ZPass is accepted.
Detailed information for other states
California - FasTrak
New York - EZ Pass NY