Fourth or the fourth may refer to:
* the ordinal form of the number 4
* One fourth, , a fraction
A fraction (from , "broken") represents a part of a whole or, more generally, any number of equal parts. When spoken in everyday English, a fraction describes how many parts of a certain size there are, for example, one-half, eight-fifths, thre ..., one of four equal parts of a whole
* ''Fourth'' (album), by Soft Machine, 1971
* Fourth (angle), an ancient astronomical subdivision
* Fourth (music), a musical interval
* '' The Fourth'', a 1972 Soviet drama
Places
* 4th meridian east, a line of longitude extending through Europe and Africa
* 4th meridian west, a line of longitude extending through Europe and Africa
* 4th parallel north, a circle of latitude above the Equator
* 4th parallel south, a circle of latitude below the Equator
* 4th Street (other)
* Fourth Avenue (other)
Time
* 4th century
* 4th century BC
Dates
* Fourth of the month, a recurrin ...