''Age Ain't Nothing but a Number'' received generally favorable reviews from
music critics. Some writers noted that Aaliyah's "silky vocals" and "sultry voice" blended with Kelly's
new jack swing helped define R&B in the 1990s. Christopher John Farley of
Time described the album as a "beautifully restrained work", noting that Aaliyah's "girlish, breathy vocals rode calmly on R.Kelly's rough beats".
Stephen Thomas Erlewine of
AllMusic felt that the album had its "share of filler," but described the singles as "slyly seductive." John Martinucci from the
Gavin Report praised the album's lyrical content, saying: "If you thought Aaliyah's debut single "Back & Forth" climbed the charts at a feverish pace, wait until you see what happens with her album, Age Ain't Nothing But A Number. Tracks touch on images of romance, partying, and hanging with da homegirls with a teenage perspective that can be appreciated by all ages." Connie Johnson from the
Los Angeles Times gave the album a 2 out of 4 rating. Johnson felt that aside from “Back & Forth, the album was bland and that "as the mouthpiece of an adult male trying to express the thoughts of a pubescent girl, Aaliyah sounds trapped in an awkward stage".
MTV.com praised the album and felt that "Aaliyah complements the album's material, appealing to both R&B; and hip-hop listeners, while managing to "keep it smooth with a jazz attitude." Maria Jiménez from
Music & Media said, "On Age Ain't Nothing but a Number, Aaliyah kicks the same smoothness, seriousness and quality jams as her mentor/producer R.Kelly." Jiménez also felt that the album had numerous potential singles including "At Your Best (You Are Love)", "Young Nation", "No One Knows How to Love Me Quite Like You Do" and "Throw Your Hands Up". In their review, the
New Sunday Times said: "A sort of global karma, re-adjustment of earth, the 3rd stone from the sun, where the material fuses with the spiritual universe, eventually to become one. Hinged onto this oneness is this idea about ''Age Ain't Nothing but a Number
." Music editors from RPM'' praised the album for being a "perfect female companion" to R. Kelly's
12 Play. The editors also felt that the album was filled with many "ear pleasing numbers" and that Aaliyah was next in line behind
Whitney Houston,
Mariah Carey and
Toni Braxton as a "chart topping queen". Tonya Pendleton from
The Washington Post felt that Aaliyah's voice "has the maturity of someone much older", as well as saying also she stood out because of her "uniquely mellifluous tone" and "the eloquent way she expresses the heartfelt passion of first love". Overall she felt that
Age Ain’t Nothing but a Number "is that rarest of recordings — a collection well suited for its teenage target group, but one that even older listeners can relate to". ==Accolades==