Gas in Massachusetts averaged $2.26 in 2005 — $3.72 in today’s money
The average price of a gallon of regular gasoline in Massachusetts across 2005, shown both as it was at the pump and adjusted for inflation to constant 2025 dollars (CPI-U).
How Massachusetts prices moved through 2005
Weekly average for regular gasoline. The year’s high was $3.22 the week of September 5, 2005; the low was $1.79 the week of January 10, 2005 — a swing of 79.5%.
View the weekly data (52 weeks)
| Week of | Nominal | 2025 $ |
|---|---|---|
| January 3, 2005 | $1.82 | $3.05 |
| January 10, 2005 | $1.79 | $3.01 |
| January 17, 2005 | $1.80 | $3.03 |
| January 24, 2005 | $1.83 | $3.07 |
| January 31, 2005 | $1.90 | $3.19 |
| February 7, 2005 | $1.91 | $3.19 |
| February 14, 2005 | $1.89 | $3.17 |
| February 21, 2005 | $1.88 | $3.15 |
| February 28, 2005 | $1.87 | $3.13 |
| March 7, 2005 | $1.94 | $3.24 |
| March 14, 2005 | $1.97 | $3.28 |
| March 21, 2005 | $2.00 | $3.34 |
| March 28, 2005 | $2.04 | $3.41 |
| April 4, 2005 | $2.11 | $3.50 |
| April 11, 2005 | $2.17 | $3.61 |
| April 18, 2005 | $2.15 | $3.58 |
| April 25, 2005 | $2.19 | $3.64 |
| May 2, 2005 | $2.20 | $3.66 |
| May 9, 2005 | $2.19 | $3.63 |
| May 16, 2005 | $2.17 | $3.61 |
| May 23, 2005 | $2.14 | $3.56 |
| May 30, 2005 | $2.10 | $3.49 |
| June 6, 2005 | $2.11 | $3.51 |
| June 13, 2005 | $2.13 | $3.55 |
| June 20, 2005 | $2.19 | $3.64 |
| June 27, 2005 | $2.22 | $3.69 |
| July 4, 2005 | $2.25 | $3.72 |
| July 11, 2005 | $2.39 | $3.95 |
| July 18, 2005 | $2.39 | $3.94 |
| July 25, 2005 | $2.37 | $3.92 |
| August 1, 2005 | $2.37 | $3.89 |
| August 8, 2005 | $2.40 | $3.94 |
| August 15, 2005 | $2.55 | $4.19 |
| August 22, 2005 | $2.61 | $4.28 |
| August 29, 2005 | $2.60 | $4.28 |
| September 5, 2005 | $3.22 | $5.21 |
| September 12, 2005 | $3.12 | $5.05 |
| September 19, 2005 | $2.94 | $4.77 |
| September 26, 2005 | $2.88 | $4.66 |
| October 3, 2005 | $2.88 | $4.66 |
| October 10, 2005 | $2.79 | $4.52 |
| October 17, 2005 | $2.69 | $4.34 |
| October 24, 2005 | $2.56 | $4.14 |
| October 31, 2005 | $2.44 | $3.95 |
| November 7, 2005 | $2.34 | $3.80 |
| November 14, 2005 | $2.22 | $3.60 |
| November 21, 2005 | $2.11 | $3.43 |
| November 28, 2005 | $2.05 | $3.33 |
| December 5, 2005 | $2.06 | $3.34 |
| December 12, 2005 | $2.13 | $3.46 |
| December 19, 2005 | $2.19 | $3.56 |
| December 26, 2005 | $2.18 | $3.54 |
2005: Massachusetts and the national picture
2005 coincided with Hurricane Katrina and Gulf Coast refinery outages. In Massachusetts, the weekly average for regular gasoline ran from a low of $1.79 (January 10, 2005) to a high of $3.22 (September 5, 2005). Adjusted for inflation, the year’s average of $3.72 ranks 10th-highest in the state’s weekly record.
How 2005 compares, adjusted for inflation
2005 was Massachusetts’s 10th-most-expensive year for gas on record, adjusted for inflation — equivalently, the 15th-cheapest of 24 years (2003–2026).
Massachusetts fuel prices by grade in 2005
Year-average price per grade. Premium figures are the spread drivers paid for higher-octane fuel that year.
| Grade | Avg / gal | 2025 $ | vs. regular |
|---|---|---|---|
| Regular | $2.26 | $3.72 | — |
| Midgrade | $2.36 | $3.89 | +10.4¢ |
| Premium | $2.46 | $4.06 | +20.4¢ |
Massachusetts gas prices in 2005, answered
- What was the average price of gas in Massachusetts in 2005?
- The average price of regular gasoline in Massachusetts in 2005 was $2.26 per gallon — about $3.72 in 2025 dollars after adjusting for inflation, according to U.S. Energy Information Administration weekly data.
- How high did gas prices get in Massachusetts during 2005?
- Massachusetts's weekly average for regular gasoline peaked at $3.22 the week of September 5, 2005 and bottomed out at $1.79 the week of January 10, 2005 — a swing of 79.5% across the year.
- Were gas prices in Massachusetts higher in 2005 than in 2004?
- Adjusted for inflation, regular gasoline in Massachusetts was more expensive in 2005 than in 2004, up 17.5% year over year.
- How does 2005 rank for gas prices in Massachusetts history?
- Adjusted for inflation, 2005 was the 10th-most-expensive year for regular gasoline in Massachusetts out of the 24 years EIA has published weekly prices (2003–2026).