28th is the ordinal form of the number 28. 28th or Twenty-eighth may also refer to:

A fraction, , equal to one of 28 equal parts 28th of the month, a recurring calendar date

Geography 28th meridian east, a line of longitude 28th meridian west, a line of longitude 28th parallel north, a circle of latitude 28th parallel south, a circle of latitude 28th Avenue 28th Street (disambiguation)

Military 28th Army (disambiguation) 28th Battalion (disambiguation) 28th Brigade (disambiguation) 28th Division (disambiguation) 28th Regiment (disambiguation) 28th Squadron (disambiguation)

Other Twenty-eighth Amendment (disambiguation) Twenty-eighth Amendment to the United States Constitution, a list of proposed amendments 28th century 28th century BC

See also 28 (disambiguation)