Jin Watanabe may refer to:

• Jin Watanabe (architect) (1887 – 1973), a Japanese architect
• Jin Watanabe (handball player) (b.1990), a Japanese handball player

• Weymouth and Portland Council election, 2007
• Weymouth and Portland Council election, 2008
• Weymouth and Portland Council election, 2010
• Weymouth and Portland Council election, 2012
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• Weymouthia (moss)
• Weymouthia (Moss)
• Weymouthia (plant)