Hezekiah Cook Seymour (June 24, 1811 – July 24, 1853) was an American civil engineer and politician.

[3] He was born on June 24, 1811, in Westmoreland, New York, to Bradford Steele Seymour and Mary Cook.

[1] From 1835 to 1849, he worked for the New York and Erie Railroad, first as engineer, later becoming general superintendent.

[4] He was New York State Engineer and Surveyor from 1850 to 1851, elected on the Whig ticket at the New York state election, 1849, but defeated for re-election at the New York state election, 1851 by Democrat William J. McAlpine.

He died on July 24, 1853, in Piermont, New York, at age 42.