About how many words does the average child know by age six?

By the age of six, the average child has increased their vocabulary to approximately 2,500 words.1

This development is significantly influenced by the quality of the child's environment, particularly the willingness of adults to engage and interact with them. While this figure serves as a general benchmark, language growth is a continuous process that relies on both biological foundations and consistent social interaction to foster comprehension and speech skills.12