Gate admission is the fee to walk onto the fairgrounds. Food, games and midway wristbands cost extra inside, so gate admission is the first cost a visitor decides on. Of the 96 events, 36 are free at the gate and the other 60 charge admission or have no known price. A free-admission fair can still charge for parking and sell rides by ticket, so free at the gate does not mean free to attend.
Gate admission
The fee to enter a fairgrounds, separate from food, games and rides.
See it at these Massachusetts fairs

Shown first
AgriculturalFamilySeasonal
Topsfield Fair
Eleven days of livestock, rides, and giant pumpkins.
Oct 2–12Topsfield
EndedAgriculturalFamilySeasonal
Marshfield Fair
A South Shore tradition since 1867. Midway, demo derby, and agricultural exhibits.
Aug 21–30Marshfield
EndedAgriculturalFamilyFood Festival
The Big E (Eastern States Exposition)
New England’s great state fair, 17 days, six state buildings, and cream puffs.
Sep 18 – Oct 4West Springfield
EndedAgriculturalSeasonalFamily
Three County Fair
A Northampton fair dating to 1818, with rodeo and livestock shows.
Date not confirmedNorthampton