Noonday is a city in Smith County, Texas, United States.

According to the United States Census Bureau, the city has a total area of 2.0 square miles (5.2 km2), all land.

As of the 2020 United States census, there were 612 people, 245 households, and 122 families residing in the city.

Currently, the City of Noonday is served by the Tyler Independent School District.

While a majority of the department is volunteers, a crew of paid firemen man the station during the week.

The Smith County Sheriff's Office out of Tyler also serves the area.