Bisphenol　A　(BPA)　is　an　industrial　material　which　can　lead　to　endocrine　disorders.　In　this　work,　a　simple　and　sensitive　spectrophotometric　method　for　determination　of　BPA　using　diazotization-coupling　reaction　was　presented.　To　achieve　the　best　performance　of　the　developed　method,　the　experimental　parameters　were　optimized　in　terms　of　reagent　concentration,　reaction　time,　pH,　and　temperature.　Under　the　optimal　conditions,　the　absorbance　increased　linearly　with　the　increasing　concentration　of　BPA　in　the　range　of　0.16-10.4　μg　mL-1　with　the　correlation　coefficient　of　0.9991　and　the　detection　limit　of　0.05　μg　mL-1.　Results　achieved　with　the　spectrophotometric　method　were　compared　with　those　obtained　using　high　performance　liquid　chromatography　(HPLC)　method.　The　proposed　method　was　successfully　applied　to　determine　BPA　in　milk　and　water　bottle　samples　and　satisfactory　results　were　obtained,　which　make　it　very　suitable　for　routine　analysis　of　BPA　in　quality　control　laboratories.　©2017　Sociedade　Brasileira　de　Química.