Flying over does not count; setting foot on solid ground (so to speak) does.
Note the ‘ALL’ option, and please also check each state individually when selecting ALL (it’s a pain, I know, but what else do you have to do that’s more important, huh?)
Note that there are actually *two *‘NONE’ options; please choose wisely.
mmm
All but Louisiana and Alabama. I keep meaning to make a trip just to tick them off the list.
I chose the ones I have actually had some kind of destination in, leaving out the ones I have set foot in, but mainly in the course of getting through them rather than to them.
Looks like 37 of them.
Note to others: this is not how you play. 
mmm
All but a few. Alaska & Hawaii, and pretty sure I’ve missed North Dakota and Vermont to date. Love me some long road trips
Canadian here. I have spent time in Washinton and California and had a brief visit of the airports in Florida and New York
Another Canadian: 38% of them.
Personally, I only counted states which had a destination, not just a layover/drive-through experience. If we add those in, I’d tick off Maryland, West Virginia, Missouri, Oklahoma, and Colorado as well. Possibly Tennessee - I don’t remember the exact route to North Carolina.
All except Alaska, Oregon, North Dakota, Maine, and Vermont.
34 plus DC. Wow. I need to hit all of them before I die.
States I’ve lived in:
Illinois
Missouri
Texas
States I’ve been to and actually did stuff in (work, or vacation):
Massachusetts
Connecticut
New York
New Jersey
Pennsylvania
Maryland
Delaware
D.C.
Virginia
North Carolina
South Carolina
Georgia
Florida
Tennessee
Kentucky
Ohio
Mississippi
Louisiana
Arkansas
Oklahoma
Kansas
Minnesota
Colorado (probably deserves “Honorable Mention” for “Lived In;” I was there working for 8 months the first time, 11 the second)
New Mexico
Washington
California
States I’ve been through (gas ‘n’ go, hotel stops for a night):
W. Virginia
Indiana
Alabama
Iowa
Wisconsin
Wyoming
Montana
South Dakota
ETA: I would really like to do Alaska before I die, just to see the Aurora Borealis.
44 plus DC. I counted Oklahoma and Georgia, where I have only changed planes, but I have physically been everywhere but Mississippi, Alabama, Alaska, Hawaii, Tennessee, and Arkansas.
Also have been in all of the Canadian provinces except for the Yukon, the Northwest Territories, Nunavut, Newfoundland and Labrador. All of the southern ones, in other words.
Exactly half.
34 and DC down, 16 to go!
All but North Dakota, although I’ve only been to an airport in Minnesota (which I ticked off, although I don’t personally count it).
I’ve probably spent at least one night in 40 of them, although sometimes it was only sleeping under an overpass while hitchhiking.
Canadian and apparently the first 100%'r.
We took annual driving vacations when I was a child throughout the mainland states and I continued that traditon as an adult. I checked off my last two - Alaska 2000, Hawaii 2008.
Puerto Rico and American Samoa are the only things keeping me from a true 100%.
Geez, it’s hard to remember all the drive-throughs and stop-overs. I think I remembered all of them, but I wouldn’t bet my Doperhood (Dopiness?) on it.
I’m missing 8 states:
Both Dakotas
Hawaii
Wyoming
Idaho
Montana
Nebraska
Kansas
37%. More than I expected, actually.