The grants, awarded to nonprofits, schools and local governments, will fund educational and celebratory programs that highlight Mississippi's role in American history.
Items eligible for drop-off include pesticides, paint, motor oil, antifreeze, batteries, fluorescent light bulbs, pool chemicals, ammonia, computers and TVs.
Activities will begin at 1 p.m. and will include creative games, snacks and a chance to view award-winning poetry by young writers from across Hattiesburg.
The nationwide effort is led by an alliance of journalists, nonprofit leaders and other supporters who want to highlight the value of reliable local reporting.
This is the second year of the revamped fair after organizers switched partnerships to North American Midway Entertainment, the largest amusement ride supplier in North America.