Septic Tank prices in Illinois

The median delivered septic tank in Illinois costs $1,957 (October 2026); most sell between $1,700 and $2,100.

Delivered prices listed by distributors on landplan.io, in US dollars. The median is the middle price; the typical range runs from the 25th to the 75th percentile. A figure is published only when enough listings from enough distributors back it. Open the interactive price index.