where do cardinals live in the united states
Northern cardinals are numerous across the eastern United States from the southern half of Maine to Minnesota to the Texas-Mexico border
Northern cardinal
Northern cardinals are numerous across the eastern United States from the southern half of Maine to Minnesota to the Texas-Mexico border and in Canada in the southern portions of Ontario, Quebec, New Brunswick and Nova Scotia, all the way east to Cape Breton Island. 
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Northern cardinal [SEP] Distribution and habitat
Northern cardinals are numerous across the eastern United States from the southern half of Maine to Minnesota to the Texas-Mexico border and in Canada in the southern portions of Ontario, Quebec, New Brunswick and Nova Scotia, all the way east to Cape Breton Island. Its range also extends south through Mexico to the Isthmus of Tehuantepec, northern Guatemala, and northern Belize. An allopatric population is found on the Pacific slope of Mexico from Jalisco to Oaxaca; "note that this population is not shown on the range map". The species was introduced to Bermuda in 1700. It has also been introduced in Hawaii, southern California and southern Arizona.