Profile Incorporated Date: January 1, 1960 Population: 313 Total Area: 5.0 sq mi Contact Information 110 Earl St. Plainville, GA 30733 Phone Number: (706) 295-5033 Fax Number: (706) 295-9429 With a vital vein of clay running through the city, Plainville grew up around brick manufacturing. In 1923 Boaz and Newton Legg established the Plainville Brick Company in the city, and it has operated continuously since.