Gas Prices in Illinois
The average price of a gallon of regular gasoline, how it’s moving, and how Illinois stacks up against the rest of the country.
Week of July 27, 2026 · estimated from regional trend
19.5¢ below
The U.S. average is $4.10. Illinois drivers pay less than the typical American.
Illinois is the 19th-cheapest place to buy regular gas of 51 states and D.C. — equivalently, the 33rd-most-expensive.
Ranked on current-week prices (week of July 27, 2026). Cheapest: Georgia ($3.63). Most expensive: Hawaii ($5.78).
Illinois gas prices over time
EIA publishes only a yearly average for Illinois, so this shows the annual history; the most recent point is the current regional estimate, matching the headline above. Values before 2000 are approximate. Toggle between the price at the pump and constant 2025 dollars.
View the data (56 points · annual)
| Date | Nominal | 2025 $ |
|---|---|---|
| 1970-01-01 * | $0.37 | $3.04 |
| 1971-01-01 * | $0.36 | $2.87 |
| 1972-01-01 * | $0.35 | $2.70 |
| 1973-01-01 * | $0.39 | $2.83 |
| 1974-01-01 * | $0.54 | $3.52 |
| 1975-01-01 * | $0.57 | $3.40 |
| 1976-01-01 * | $0.59 | $3.35 |
| 1977-01-01 * | $0.63 | $3.34 |
| 1978-01-01 * | $0.64 | $3.16 |
| 1979-01-01 * | $0.88 | $3.88 |
| 1980-01-01 * | $1.18 | $4.61 |
| 1981-01-01 * | $1.28 | $4.53 |
| 1982-01-01 * | $1.24 | $4.14 |
| 1983-01-01 * | $1.09 | $3.53 |
| 1984-01-01 * | $1.06 | $3.29 |
| 1985-01-01 * | $1.09 | $3.25 |
| 1986-01-01 * | $0.82 | $2.39 |
| 1987-01-01 * | $0.87 | $2.46 |
| 1988-01-01 * | $0.88 | $2.38 |
| 1989-01-01 * | $0.96 | $2.50 |
| 1990-01-01 * | $1.13 | $2.77 |
| 1991-01-01 * | $1.10 | $2.60 |
| 1992-01-01 * | $1.06 | $2.43 |
| 1993-01-01 * | $1.04 | $2.31 |
| 1994-01-01 * | $1.08 | $2.36 |
| 1995-01-01 * | $1.14 | $2.42 |
| 1996-01-01 * | $1.24 | $2.54 |
| 1997-01-01 * | $1.20 | $2.41 |
| 1998-01-01 * | $1.05 | $2.08 |
| 1999-01-01 * | $1.12 | $2.17 |
| 2000-01-01 | $1.48 | $2.77 |
| 2001-01-01 | $1.44 | $2.62 |
| 2002-01-01 | $1.33 | $2.39 |
| 2003-01-01 | $1.49 | $2.61 |
| 2004-01-01 | $1.76 | $3.00 |
| 2005-01-01 | $2.13 | $3.52 |
| 2006-01-01 | $2.43 | $3.88 |
| 2007-01-01 | $2.70 | $4.20 |
| 2008-01-01 | $3.13 | $4.69 |
| 2009-01-01 | $2.27 | $3.41 |
| 2010-01-01 | $2.71 | $4.01 |
| 2011-01-01 | $3.45 | $4.94 |
| 2012-01-01 | $3.53 | $4.95 |
| 2013-01-01 | $3.44 | $4.75 |
| 2014-01-01 | $3.29 | $4.47 |
| 2015-01-01 | $2.36 | $3.21 |
| 2016-01-01 | $2.10 | $2.82 |
| 2017-01-01 | $2.36 | $3.10 |
| 2018-01-01 | $2.61 | $3.35 |
| 2019-01-01 | $2.49 | $3.14 |
| 2020-01-01 | $2.04 | $2.54 |
| 2021-01-01 | $2.89 | $3.43 |
| 2022-01-01 | $3.80 | $4.18 |
| 2023-01-01 | $3.37 | $3.56 |
| 2024-01-01 | $3.18 | $3.26 |
| 2026-07-27 * | $3.90 | $4.00 |
Current average
EIA does not publish separate weekly grade or diesel prices for Illinois. The headline above is an estimate for the current week; EIA’s most recent published annual average for Illinois was $3.18 in 2024. For live grade-level pricing, see a weekly-reporting state such as California.
The highs and lows
Illinois vs. the nation and its neighbors
Latest comparable annual state averages for regular gasoline (2024, EIA SEDS) — a consistent all-51 basis, distinct from the current-week estimate above.
Illinois gas prices, answered
- What is the average price of gas in Illinois right now?
- As of the week of July 27, 2026 (estimated from regional trends), the average price of regular gasoline in Illinois is $3.90 per gallon, according to U.S. Energy Information Administration data.
- Is gas more expensive in Illinois than the national average?
- Illinois's average of $3.90 is 19.5¢ below the U.S. average of $4.10 per gallon for regular gasoline.
- What is the highest gas price ever recorded in Illinois?
- The highest average regular gasoline price recorded for Illinois in this series was $3.80 per gallon in 2022. The lowest was $0.35 in 1972.
- Are gas prices in Illinois going up or down?
- Over the latest week, the average price of regular gasoline in Illinois rose to $3.90 per gallon. Illinois currently ranks 19th-cheapest of 51 states and D.C. for regular gasoline.