Illinois adjectives are listed in this post. Each word below can often be found in front of the noun illinois in the same sentence. This reference page can help answer the question what are some adjectives commonly used for describing ILLINOIS.
central, downstate, early, eastern
fifth, first, former, fourth
great, new, ninth, northern
northwestern, old, other, rural
second, seventh, sixth, small
southern, third, western
Hope this word list had the adjective used with illinois you were looking for. Additional describing words / adjectives that describe / adjectives of various nouns can be found in the other pages on this website.