COE

Here is a table from filtering a list of government campgrounds on the website poi-factory.com

I have not verified the accuracy.

State Count of COE parks
AL 26
AR 117
CA 3
CO 2
CT 1
FL 3
GA 44
IA 24
ID 4
IL 20
KS 50
KY 32
MN 9
MO 51
MS 21
MT 3
NC 4
ND 10
NE 6
NM 5
OH 2
OK 76
OR 2
PA 15
SC 7
SD 3
TN 25
TX 88
VA 11
VT 2
WA 7
WI 5
WV 12
Grand
Total 690