CDC checklist

15 Month Milestones

Here's what most children (75% or more) do by 15 months, according to the CDC. Tick off what you've seen and bring the list to your next checkup.

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Social and emotional

Language and communication

Learning and problem-solving

Movement and physical

If something worries you

You know your child best. If your child isn't reaching one or more milestones, has lost skills they once had, or you have other concerns, talk with your child's doctor. The CDC says not to wait. You can also contact your state's early intervention program at cdc.gov/FindEI.

Things to try at 15 months (from the CDC)

  • Help your child learn to speak. A child's early words are not complete. Repeat and add to what he says. He may say "ba" for ball and you can say "Ball, yes, that's a ball."
  • Tell your child the names of objects when he points to them and wait a few seconds to see if he makes any sounds before handing it to him. If he does make a sound, acknowledge him, and repeat the name of the object. "Yes! Cup."
  • Find ways to let your child help with everyday activities. Let her get her shoes to go outside, put the snacks in the bag for the park, or put the socks in the basket.

Source: CDC, What most children do by 15 months (CDC Learn the Signs. Act Early. milestone checklists), retrieved 2026-10-16. These checklists don't replace developmental screening by your child's doctor. Sprout Diary is not a medical service.