Robinson is a city in McLennan County, Texas, United States. The population was 12,443 at the 2020 census. It is part of the Waco Met…Robinson is a city in McLennan County, Texas, United States. The population was 12,443 at the 2020 census. It is part of the Waco Metropolitan Statistical Area. As of the 2020 United States census, there were 12,443 people, 3,868 households, and 3,297 families residing in the city.