Counties and equivalents you've been to in 2020

[Cokeland Saxton]

Arizona
Cochise (Feb 20)*
Coconino (Mar 3)
Maricopa (Feb 23)*
Navajo (Mar 4)*
Pima (Feb 16)*
Pinal (Feb 18)*
Yavapai (Mar 3)

Arkansas
Clark (Dec 30)
Crittenden (Dec 30)
Hempstead (Dec 30)
Hot Spring (Dec 30)
Lonoke (Dec 30)
Miller (Dec 30)
Mississippi (Dec 30)
Monroe (Dec 30)
Nevada (Dec 30)
Prairie (Dec 30)
Pulaski (Dec 30)
Saline (Dec 30)
St. Francis (Dec 30)

Illinois
Alexander (Dec 29)
Champaign (Dec 29)
Clay (Dec 29)
Coles (Dec 29)
Cumberland (Dec 29)
Douglas (Dec 29)
Effingham (Dec 29)
Fayette (Dec 29)
Ford (Dec 29)
Franklin (Dec 29)
Iroquois (Dec 29)
Jefferson (Dec 29)
Johnson (Dec 29)
Kankakee (Dec 29)
Marion (Dec 29)
Pulaski (Dec 29)
Shelby (Dec 29)
Union (Dec 29)
Williamson (Dec 29)

Indiana
Allen (Sept 18)
Elkhart (Jan 28)
Huntington (Feb 8 )
Jasper (Dec 29)
Lake (Dec 29)
LaPorte (Dec 29)
LaGrange (Feb 8 )
Newton (Dec 29)
Noble (Feb 8 )
Porter (Dec 29)
St. Joseph (Jan 28)
Whitley (Feb 8 )

Michigan
Cass (late Aug)
St. Joseph (late Aug)

Missouri
Mississippi (Dec 29)
New Madrid (Dec 30)
Pemiscot (Dec 30)
Scott (Dec 29)

New Mexico*
Doña Ana (Feb 20)*
Grant (Feb 20)*
Hidalgo (Feb 20)*
Luna (Feb 20)*

Texas
Bowie (Dec 31)
Cameron (Jan 1)
Dallas (Jan 28)
DeWitt (Dec 31)
Ellis (Dec 31)
El Paso (Feb 20)*
Falls (Dec 31)*
Fayette (Dec 31)
Franklin (Dec 31)
Hidalgo (Jan 14)
Hill (Dec 31)
Hopkins (Dec 31)
Hunt (Dec 31)
Lavaca (Dec 31)
Lee (Dec 31)*
McLennan (Dec 31)
Milam (Dec 31)*
Morris (Dec 31)
Rockwall (Dec 31)
Tarrant (Jan 28)
Titus (Dec 31)
Victoria (Dec 31)

Final list for 2020

83 in 2020, 13 for the first time. I also entered New Mexico for the first time this year, meaning I have now been in 31 states and DC.
* = First time ever in lifetime

[Nutmeg]

I’m considering been to as actually spent at least a collective 10 hours in. There’s some counties I’ve traveled through but haven’t really been to

Wow, that is a tough standard. I don't think there is 10 hours' worth of activity to do in many of the nation's 3,143 counties. You're also not legally allowed to spend that long in Kalawao County, Hawai'i (consecutively, though you could visit a couple of times to accomplish the same).