| Song Title | Source | Composer(s) |
| It's For Me | Breathe
| Martin |
| It's Fun to Think | All American
| Strouse |
| It's Funny About Love | Hark!
| Goggin |
| It's Getting Better | What's a Nice Country Like You Doing in a State Like This?
| Hoffmann |
| It's Going to Be Good to Be Gone | I Remember Mama
| Rodgers |
| It's Gonna Be Another Hot Day |
| |
| It's Gonna Be Good | Next to Normal
| Kitt |
| It's Gonna Be Good (Reprise) | Next to Normal
| Kitt |
| It's Gonna Be! | Princess Diana, the Musical
| Javitch |
| It's Good to Be Alive | Zulu And The Zayda, The
| Rome |
| It's Good to Be Alive | New Girl in Town
| Merrill |
| It's Good To Be Alive (Reprise) | New Girl in Town
| Merrill |
| It's Good to Be Back Home | Fade Out, Fade In
| Styne |
| It's Good to Be Here | Happy Hunting
| Karr |
| It's Good To Be Home | Thou Shalt Not
| Connick |
| It's Good To Be Home (Reprise) | Thou Shalt Not
| Connick |
| It's Gorgeous to Be Graceful | Be Yourself
| Rose |
| It's Got Be Love | On Your Toes
| Rodgers |
| It's Gotta Be Venus | Pageant
| Evans |
| It's Great To Be a Horse | Cowboy And The Tiger, The
| Beebe |
| It's Great to Be Alive | Arabian Nights
| Loeb, Lombardo |
| It's Great to Be Alive | Texas, Li'l Darlin'
| Dolan |
| It's Hard to Care | Shelter
| Ford |
| It's Hard to Speak My Heart | Parade
| Brown |
| It's Harry I'm Planning to Marry | Calamity Jane
| Fain |
| It's High Time | Gentlemen Prefer Blondes
| Styne |
| It's Him | Ballad Of Little Mikey, The
| Savage |
| It's His Widgie | Bunch Of Ratbags, A
| Pinne |
| It's Hot | Chair in the Landscape
| Daly, Jefferson |
| It's Hot up Here | Sunday in the Park with George
| Sondheim |
| It's Impossible | Words and Music
| various |
| It's In His Kiss | Stop in the Name of Love
| various |
| It's In Your Hands Now | Road Show
| Sondheim |
| It's Just a Crime | Dracula: a Rock Opera
| Briggs, West |
| It's Just a Little Awkward | I Sing!
| Bolin |
| It's Just a Matter of Time | Ace
| Oberacker |
| It's Just A New Spanish Custom | We're Not Dressing
| Revel |
| It's Just My Little Tribute to Caligula, Darling! | Closer to Heaven
| Tennant, Lowe |
| It's Just That Kind of Play | Hollywood Party
| Rodgers |
| It's Just What I Wanted | Junior Miss
| Lane |
| It's Legitimate | Do Re Mi
| Styne |
| It's Like | So Long, 174th Street
| Daniels |
| It's Like a Beautiful Woman | Happy Hunting
| Karr |
| It's Like Dis, Crown | Porgy and Bess
| Gershwin |
| It's Love | Wonderful Town
| Bernstein |
| It's Love | King Island Christmas
| Friedman |
| It's Love (Reprise) | Wonderful Town
| Bernstein |
| It's Love I'm After | Pigskin Parade
| Pollack |
| It's Love I'm in | American Tragedy, An
| Strouse |
| It's Love, My Darling, It's Love | Golden City
| Toré |