Starting July 1, minimum wage in Chicago will increase by $1 to $14 per hour for employers with more than 21 workers. Wages at smaller businesses will increase to $13.50. In Cook County the minimum wage will increase to $13 an hour, and across the state of Illinois the minimum wage will rise to $10 an hour. For a full-time minimum wage employee in Illinois, this increase will mean an extra $30 a week or about $120 more per month.