How gas prices have changed in Decatur, Illinois in the last week

Written by:
April 20, 2026
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How gas prices have changed in Decatur, Illinois in the last week

Stacker compiled statistics on gas prices in Decatur, IL metro area using data from AAA. Gas prices are current as of April 20.

Decatur, Illinois by the numbers
- Gas current price: $4.01
--- Illinois average: $4.30
- Week change: -$0.16 (-3.9%)
- Year change: +$0.74 (+22.7%)
- Historical expensive gas price: $5.07 (6/23/22)

- Diesel current price: $5.29
- Week change: -$0.11 (-2.0%)
- Year change: +$1.85 (+53.9%)
- Historical expensive diesel price: $5.58 (6/24/22)

Metros with the least expensive gas
#1. Lawton, OK: $3.25
#2. Springfield, MO: $3.30
#3. Joplin, MO: $3.31

Read on to see which metros have the most expensive gas prices.

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1 / 5
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#5. San Luis Obispo-Atascadero-Paso Robles, CA

- Regular gas price: $5.97
2 / 5
Rangsarit Chaiyakun // Shutterstock

#4. Napa, CA

- Regular gas price: $5.97
3 / 5
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#3. San Rafael, CA

- Regular gas price: $5.97
4 / 5
Istvan Csak // Shutterstock

#2. Salinas, CA

- Regular gas price: $5.98
5 / 5
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#1. Santa Rosa, CA

- Regular gas price: $5.99
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