Jianyuan may refer to:
- Remonstrance Bureau, a government agency during the Song and Jurchen Jin dynasties
Historical eras
- Jianyuan (140BC–135BC), era name used by Emperor Wu of Han
- Jianyuan (315–316), era name used by Liu Cong (Han-Zhao), emperor of Former Zhao
- Jianyuan (343–344), era name used by Emperor Kang of Jin
- Jianyuan (365–385), era name used by Fu Jian (337–385), emperor of Former Qin
- Jianyuan (479–482), era name used by Emperor Gao of Southern Qi
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