I'm trying to update a list, that was posted back in 2005.
So, if anyone has any corrections, please post them up.
Thanks. :)

State Police/Highway Patrol = sidearm (caliber)
AL = Glock 22 (.40S&W)
AK = Glock 22 (.40S&W)
AZ = SIG P229 (.40S&W)
AR = Glock 21 (.45ACP)
CA = S&W Model 4006TSW (.40S&W)
CO = S&W M&P40 (.40S&W)
CT = SIG P226 (.40S&W)
DE = SIG P229 (.357SIG)
D.C. = Glock 17 (9x19mm)
FL = Glock 37Gen4 (.45GAP)
GA = Glock 37 (.45GAP)
HI = S&W Model 5906 (9x19mm)
ID = Glock 22 (.40S&W)
IL = Glock 22 (.40S&W)
IN = Glock 17 (9x19mm)
IA = S&W M&P40 (.40S&W)
KS = Glock 21 (.45ACP)
KY = Glock 35 (.40S&W)
LA = SIG P220 (.45ACP)
ME = H&K USP45 (.45ACP)
MD = Beretta PX4 (.40S&W)
MA = SIG P226 (.40S&W)
MI = SIG P226 (.40S&W)
MN = Glock 22 (.40S&W)
MS = Glock 22 (.40S&W)
MO = Glock 22 (.40S&W)
MT = SIG P229 (.40S&W)
NE = Glock 22 (.40S&W)
NH = S&W M&P45 (.45ACP)
NV = SIG P229 (.40S&W)
NJ = SIG P228 (9x19mm)
NM = S&W M&P357 (.357SIG)
NY = Glock 37 (.45GAP)
NC = S&W M&P357 (.357SIG)
ND = S&W Model 4506 (.45ACP)
OH = SIG P226 (.40S&W)
OK = SIG P226 (.357SIG)
OR = Glock 22 (.40S&W)
PA = Glock 37 (.45GAP)
RI = SIG P226 (.357SIG)
SC = Glock 37 (.45GAP)
SD = SIG P229 (.40S&W)
TN = Glock 31 (.357SIG)
TX = SIG P226 (.357SIG)
UT = Glock 22 (.40S&W)
VT = SIG P229 (.40S&W)
VA = SIG P229 (.357SIG)
WA = S&W M&P357 (.357SIG)
WV = S&W Model 4566TSW (.45ACP)
WI = Glock 22 (.40S&W)
WY = Glock 22 (.40S&W)