The Williamson County fair is set to kickoff on Friday. The annual event will be held at the Williamson County Ag Expo Park. Gates are set to open at 6 p.m.Adult tickets are $6 for adults, while admission for children six to 12 is $3. Children under the age of six are free. The fair continues through August 10.For more information visit WilliamsonCountyFair.org.