Baby Not Walking at 15 Months: What Parents Should Know

The Walking Window Is Wider Than Most Parents Expect

Independent walking is considered developmentally typical anywhere from roughly 9 to 18 months. The CDC's 'Learn the Signs. Act Early.' milestones list walking independently as an expected skill by 15 months — meaning most (75% or more) of children can do it by then — but babies who walk closer to 18 months are still within what developmental guidelines describe as typical 1Ref 1Centers for Disease Control and Prevention (2024).Milestones by 15 Months — Learn the Signs. Act Early..Walking independently listed as an expected motor milestone by 15 months; the 15-month checklist documents stepping and weight-bearing skills.

What matters more than the exact age is the full picture: Is the baby bearing weight on their legs? Pulling to stand? Cruising along furniture? Showing curiosity about moving through space? These stepping-stone skills are strong signals that walking is approaching.

Skills That Usually Come Before Walking

Walking independently tends to follow a sequence of earlier motor skills. Babies generally sit without support by around 6–8 months, pull themselves to a standing position by 9–12 months, cruise (walk sideways while holding furniture) between 9 and 12 months, stand briefly without support, and then take first steps 1Ref 1Centers for Disease Control and Prevention (2024).Milestones by 15 Months — Learn the Signs. Act Early..Walking independently listed as an expected motor milestone by 15 months; the 15-month checklist documents stepping and weight-bearing skills.

A baby who has not yet reached the cruising stage by 12–13 months, or who is not bearing weight on their legs when held upright, may benefit from an earlier conversation with their pediatrician — not because something is necessarily wrong, but because early assessment is easier and more useful than waiting.

What a Pediatrician Looks At

At the 15-month well-child visit, a pediatrician will typically watch the baby move, ask about cruising and weight-bearing, and check muscle tone in the legs. They are looking at gross motor development in the context of everything else — language, social skills, fine motor — because development is interconnected. The American Academy of Pediatrics recommends developmental surveillance at every well-child visit and formal developmental screening at 9, 18, and 30 months 2Ref 2Lipkin PH, Macias MM; Council on Children with Disabilities, Section on Developmental and Behavioral Pediatrics (2020).Promoting Optimal Development: Identifying Infants and Young Children With Developmental Disorders Through Developmental Surveillance and Screening.AAP recommendation for developmental surveillance at every well-child visit and standardized screening at 9, 18, and 30 months; referral criteria for early intervention.

If there is any concern, a referral to an early intervention program or a pediatric physical therapist may be offered.

Early Intervention: What It Is and How to Access It

Early intervention is a federally supported program available in every U.S. state under Part C of the Individuals with Disabilities Education Act (IDEA) for children under age 3 3Ref 3American Academy of Pediatrics / HealthyChildren.org (2023).What Is Early Intervention?.Early intervention under IDEA Part C: eligibility, free evaluation, parent-initiated referral, services available for children under age 3. It provides free developmental evaluations and, if a child qualifies, therapy services including physical therapy for motor delays. Parents can request an evaluation without a physician referral — they can contact their state's program directly. A pediatrician can also make a referral.

The evaluation is free of charge and does not require a formal diagnosis. Services are typically provided in natural environments such as the home, and an Individualized Family Service Plan (IFSP) outlines goals and supports 3Ref 3American Academy of Pediatrics / HealthyChildren.org (2023).What Is Early Intervention?.Early intervention under IDEA Part C: eligibility, free evaluation, parent-initiated referral, services available for children under age 3.

Things That Can Influence When a Baby Walks

Several factors can affect walking timing without reflecting a problem. Babies who spend less time on the floor exploring tend to walk a bit later. Heavier babies sometimes take a few extra weeks. Cautious or observational temperaments are associated with later walking. Prematurity is another common factor — a baby born significantly early is often assessed against their corrected age rather than their birth date.

Twin or multiple births sometimes also show slightly later motor milestones on average, in part because of prematurity rates in that group.

When It Makes Sense to Reach Out Before the Next Visit

If a baby is 15 months old and not yet walking, mentioning it at the next scheduled visit is a reasonable step. Reaching out sooner makes sense if the baby is not bearing weight on their legs at all, if one leg seems weaker or different from the other, if the baby has lost skills they previously had, or if there are concerns about muscle tone (feeling very floppy or very stiff). These are not reasons to panic — they are reasons to get an earlier look 2Ref 2Lipkin PH, Macias MM; Council on Children with Disabilities, Section on Developmental and Behavioral Pediatrics (2020).Promoting Optimal Development: Identifying Infants and Young Children With Developmental Disorders Through Developmental Surveillance and Screening.AAP recommendation for developmental surveillance at every well-child visit and standardized screening at 9, 18, and 30 months; referral criteria for early intervention.