Well a mill worker is a worker who works in a mill. To be more specfic it can be a child or an adult and they make cotton.he LOWEST Paying Job in the mill is $19.23 an hour.. The Highest is around $50/hr for WORKERS of non-management jobs. There is ALSO a … lot of OT given in the mills. Id say, on average, A Mill worker with a steady shift and SOME Ot is banking about 55,000 a yr.