| Year | Title | Role |
| 1972 | Gone with the Wind | — |
| 1973–1974 | Gypsy | Baby June |
| 1981, 1983 | Cats | Rumpleteazer |
| 1983–1985, 1989–1990 | The Pirates of Penzance | Mabel & Kate |
| 1984 | 42nd Street | Peggy Sawyer |
| 1985–1986 | Peter Pan | Peter Pan |
| 1985 | Me and My Girl | Sally Smith |
| 1987 | Charlie Girl | Charlie |
| 1990 | Queen Mother's 90th Birthday Gala Performance | Herself |
| 1991 | Time of My Life | Jan Cheyney |
| 1993 | Hollywood and Broadway II | Herself, Wayne Sleep, Kim Criswell |
| 1998 | Oklahoma! | Ado Annie |
| Sweet Charity | Charity Hope Valentine |
| 2001 | Bonnie Langford Now: And Her Musicians | Herself |
| 2002 | Big Night Out at The Little Theatre |
| 2004 | Fosse | Headline Performer |
| 2005 | Children Will Listen | |
| Pete 'N' Me | Judy |
| 2006–2010 | Chicago | Roxie Hart |
| 2006–2007 | Guys and Dolls | Miss Adelaide |
| 2007 | Torvill and Dean's Dancing on Ice: The Tour 2007 | Herself |
| Short and Curly |
| 2008 | Torvill and Dean's Dancing on Ice: The Tour 2008 |
| 2010 | The Oscar Show |
| Queen of the Stardust Ballroom |
| 2010–2011 | Brits Off Broadway |
| 2012–2014 | Spamalot | The Lady of the Lake |
| 2012 | The Night of 1,000 Voices | Herself |
| 2014 | Torvill and Dean's Dancing on Ice: The Tour 2014 |
| 2014–2015 | Dirty Rotten Scoundrels (musical) | Muriel Eubanks |
| 2015 | Charles Strouse with Bonnie Langford | Herself |
| Hey, Old Friends! |
| 2016, 2019 | An Evening with Bonnie Langford |
| 2016 | Singular Sensations |
| 2018–2019 | 42nd Street | Dorothy Brock |
| 2019–2020 | 9 to 5 | Roz Keith |
| 2021 | The Show Must Go On! | Herself |
| 2022 | Anything Goes | Evangeline Harcourt |
| 2023, 2025 | Stephen Sondheim's Old Friends | Herself / Various |
| 2024-2025 | Les Misérables | Madame Thénardier |
| 2025-present | Paddington the Musical | Mrs Bird |
| Sources: |
