Tri Delta has:
(I can't believe I'm counting this! I have homework to do and stuff!
Some of these might be a little off as Tri Delta's website lists both active and inactive chapters and I'm trying to only count the active ones . . . but sometimes I miss.)
WEST = 25
CA 12, AZ 2, WA 3, NV 1, WY 1, UT 1, CO 3, OR 1, ID 1
AK none, HI none, MT none, NM none
MIDWEST = 36
OH 6, MO 4, IA 4, IL 5, IN 5, KS 4, MI 1, NE 1, OK 3, WI 1, ND 1, MN 1
SD none
NORTHEAST = 18
PA 7, VT 1, MA 1, NY 6, NH 1, NJ 2
RI none, CT none, ME none
SOUTH = 53
TX 10, TN 3, NC 3, GA 4, FL 7, SC 5, KY 3, AL 3, VA 5, MD 1, AR 2, LA 2, MS 5
DC none, WV none, DE none
CANADA = 2
ON = 2