| 30301 | March 18 | Birth | 1949 – Bertha Gilkey, American activist (d. 2014) |
| 30302 | March 18 | Birth | 1949 – Alex Higgins, Irish snooker player (d. 2010) |
| 30303 | March 18 | Birth | 1949 – Åse Kleveland, Norwegian singer and politician |
| 30304 | March 18 | Birth | 1949 – Hannu Siitonen, Finnish javelin thrower |
| 30305 | March 18 | Birth | 1950 – James Conlon, American conductor and educator |
| 30306 | March 18 | Birth | 1950 – Brad Dourif, American actor |
| 30307 | March 18 | Birth | 1950 – John Hartman, American drummer (Doobie Brothers) |
| 30308 | March 18 | Birth | 1950 – Eiji Okuda, Japanese actor and director |
| 30309 | March 18 | Birth | 1950 – Linda Partridge, English geneticist and academic |
| 30310 | March 18 | Birth | 1950 – Larry Perkins, Australian race car driver |
| 30311 | March 18 | Birth | 1951 – Paul Barber, English actor |
| 30312 | March 18 | Birth | 1951 – Ben Cohen, American businessman co-founded Ben and Jerry's |
| 30313 | March 18 | Birth | 1951 – Bill Frisell, American guitarist and composer |
| 30314 | March 18 | Birth | 1951 – Mart Murdvee, Estonian psychologist and scholar |
| 30315 | March 18 | Birth | 1952 – Will Durst, American journalist and actor |
| 30316 | March 18 | Birth | 1952 – Pat Eddery, Irish jockey |
| 30317 | March 18 | Birth | 1952 – Bernie Tormé, Irish singer-songwriter and guitarist (Gillan, Guy McCoy Tormé, and Desperado) |
| 30318 | March 18 | Birth | 1952 – Mike Webster, American football player (d. 2002) |
| 30319 | March 18 | Birth | 1953 – Franz Wright, Austrian-American poet and translator (d. 2015) |
| 30320 | March 18 | Birth | 1953 – Takashi Yoshimatsu, Japanese composer |
| 30321 | March 18 | Birth | 1955 – Ana Obregón, Spanish actress, screenwriter, and biologist |
| 30322 | March 18 | Birth | 1955 – Francis G. Slay, American lawyer and politician, 45th Mayor of St. Louis |
| 30323 | March 18 | Birth | 1955 – Jeff Stelling, English journalist and game show host |
| 30324 | March 18 | Birth | 1956 – Rick Martel, Canadian wrestler |
| 30325 | March 18 | Birth | 1956 – Deborah Jeane Palfrey, American madam (d. 2008) |
| 30326 | March 18 | Birth | 1956 – Ingemar Stenmark, Swedish skier |
| 30327 | March 18 | Birth | 1957 – Christer Fuglesang, Swedish physicist and astronaut |
| 30328 | March 18 | Birth | 1957 – György Pazdera, Hungarian bass player (Pokolgép) |
| 30329 | March 18 | Birth | 1957 – Wolfgang Schilling, German footballer |
| 30330 | March 18 | Birth | 1958 – Richard de Zoysa, Sri Lankan journalist and author (d. 1990) |