WhenMyBaby Firsts > Sitting up (Results)

When do babies start sitting up

On average, based on a total of 402 votes:

- Babies start sitting up at 5.1 months!

- Girls at 5.0 months (208 votes)
- Boys at 5.1 months (194 votes)

See boy vs. girl sitting up comparison chart below!

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Chart shows age ranges for when babies start sitting up

Chart compares when baby boys and girls start to sit up

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*Every baby is unique and develops at his or her own pace, sometimes earlier or later than other babies for any given milestone. These statistics are based on aggregated votes by parents visiting WhenMyBaby.com. If you have any questions or concerns about your baby's development, make sure to immediately discuss with your baby's medical doctor and/or healthcare provider.