Du Page County Highway 31 is a east-west highway in southern Du Page County. It has three sections in the county. The first runs from the Cook/Du Page County Line to 83rd Street, along Plainfield Road. DPCH 31 follows 83rd Street from Plainfield Road to Lemont Road. The along 87th Street/Boughton Road from Lemont Road to the Du Page/Will County Line.
A busy sign assembly at the Will/Cook County Line. Western end marker at the Will/Du Page County Line. Looking east along DPCH 31 as it intersects with DPCH 56. EB DPCH 31 in Darien. A end marker on EB DPCH 31 at Lemont Road. The begin marker for DPCH 31 for the 83rd Street section at DPCH 9. EB DPCH 31 at the eastern end. (September, 2024) EB DPCH 31 at the eastern end marker. (September, 2024)
