The Nonsan–Cheonan Expressway (Korean: 논산천안고속도로) is an expressway serving the South Chungcheong region in South Korea.

It connects Nonsan on the Gyeongbu Expressway to Cheonan on the Honam Expressway.

[1] The freeway's route number is 25, which it shares with the Honam Expressway.

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