Night Owl

According to Seek A Brew as of October 24, 2012 126 breweries distribute to Massachusetts.

I've had beers from 95 of those breweries.

There are some errors and exclusions in Seek A Brew's list. Below are the Breweries I count as distributing to the Bay State.

Category /
21stAmendmentBrewery
AbitaBrewingCompany
AleSmithBrewingCompany
Allagash
AnchorBrewing
AndersonValley
AtlanticBrewingCompany
AveryBrewing
BacklashBeerCompany
BallastPointBrewingCompany
BaxterBrewingCompany
BearRepublicBrewing
BeerWorks
BelfastBayBrewing
BerkshireBrewingCompany
BoulderBeerCompany
BoulevardBrewing
BreckenridgeBrewery
BreweryOmmegang
BrooklynBrewery
CambridgeBrewingCompany
CapeAnnBrewingCompany
CapeCodBeer
CiscoBrewers
ClipperCityBrewingCompany
ClownShoes
DLGearyBrewingCompany
DogfishHead
EelRiverBrewing
FirestoneWalker
FlyingDogBrewery
FoundersBrewingCompany
GooseIsland
GrandTetonBrewing
GreatDivideBrewingCompany
GrittyMcDuffs
Harpoon
HaverhillBrewery
HighAmpMightyBeerCo
IdleHandsCraftAles
IthacaBeerCo
JacksAbbyBrewing
JacobLeinenkugelBrewing
JollyPumpkinArtisanAles
JustBeerBrewing
KonaBrewingCompany
LagunitasBrewing
LeftHandBrewingCompany
LongTrail
MagicHat
MaineBeerCompany
MattBrewingCompany
MayflowerBrewingCompany
MendocinoBrewingCompany
MercuryBrewingCo
MysticBrewery
NapaSmithBrewery
NashobaValley
NightShiftBrewing
NorthCoastBrewing
NotchSessionBeer
OakPondBrewingCompany
OPA-OPASteakhouseAndBrewery
OskarBlues
OtterCreekBrewing
PeakOrganicBrewing
PortBrewingCompany
PrettyThingsBeerAndAleProject
RedHook
RisingTideBrewingCompany
RockArtBrewery
Rogue
SamAdams
SeaDogBrewingCo
SebagoBrewingCompany
ShmaltzBrewingCompany
SierraNevada
SixpointCraftAles
Slumbrew
Smuttynose
SouthamptonPublickHouse
SouthernTierBrewing
SpeakeasyAlesAmpLagers
Stone
TheBruery
TheShipyardBrewery
ThomasHooker
TrEgsBrewingCompany
UintaBrewingCompany
VictoryBrewingCompany
WachusettBrewingCompany
WeyerbacherBrewing
WhiteBirchBrewing
WidmerBrothersBrewing
WormtownBrewing