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|---|---|---|---|---|
| 国道203号 | ||||
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| Route information | ||||
| Length | 47.3 km[1] (29.4 mi) | |||
| Existed | 18 May 1953–present | |||
| Major junctions | ||||
| North end |  National Route 202 in Karatsu | |||
| South end |  National Route 34 in Saga | |||
| Location | ||||
| Country | Japan | |||
| Highway system | ||||
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National Route 203 is a national highway of Japan connecting Karatsu and Saga in Japan, with a total length of 47.3 km (29.39 mi).
