Lake Worth is a city in Tarrant County, Texas, United States.

The city is adjacent to, and named after, Lake Worth, a popular recreational lake in the northwestern portion of Tarrant County.

According to the United States Census Bureau, the city has a total area of 2.5 square miles (6.5 km2), all land.

As of the 2020 United States census, there were 4,711 people, 1,704 households, and 1,162 families residing in the city.

The city of Lake Worth is served by the Lake Worth Independent School District.