4 - 25Episode #425May. 22, 1999- 4 - 24Episode #424May. 15, 1999
- 4 - 23Episode #423May. 08, 1999
- 4 - 22Episode #422May. 01, 1999
- 4 - 21Episode #421Apr. 10, 1999
- 4 - 20Episode #420Mar. 27, 1999
- 4 - 19Episode #419Mar. 13, 1999
- 4 - 18Episode #418Feb. 27, 1999
- 4 - 17Episode #417Feb. 20, 1999
- 4 - 16Episode #416Feb. 13, 1999
- 4 - 15Episode #415Feb. 06, 1999
- 4 - 14Episode #414Jan. 30, 1999
- 4 - 13Episode #413Jan. 16, 1999
- 4 - 12Episode #412Jan. 09, 1999
- 4 - 11Episode #411Dec. 12, 1998
- 4 - 10Episode #410Dec. 05, 1998
- 4 - 9Episode #409Nov. 21, 1998
- 4 - 8Episode #408Nov. 14, 1998
- 4 - 7Episode #407Nov. 07, 1998
- 4 - 6Episode #406Oct. 31, 1998
- 4 - 5Episode #405Oct. 12, 1998
- 4 - 4Episode #404Oct. 03, 1998
- 4 - 3Episode #403Sep. 26, 1998
- 4 - 2Episode #402Sep. 19, 1998
- 4 - 1Episode #401Sep. 12, 1998
The fourth season of MADtv aired from August 29, 1998, to May 22, 1999, with 25 episodes.
