507國道(或「國道507線」、「G507線」),也稱長海—長興島公路,是在中國的一條國道,起點為 遼寧省大連市長興島經濟技術開發區,終點為遼寧省大連市長海縣的國道,途經瓦房店,502國道為《國家公路網規劃》[1]普通國道網182條聯絡線的第7條。
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