[5] Corinth Presbyterian Church was founded in Parker in 1846, with the current sanctuary built in 1923, and is thought to be the oldest continuing congregation in Collin County.

[6] Parker is located in southern Collin County and is bordered to the north by Allen, to the west by Plano, to the south by Murphy, to the southeast by Wylie, and to the northeast by Lucas.

[7] Parker is the location of the Southfork Ranch, the setting used in the television series Dallas.

[9] As of the 2020 United States census, there were 5,462 people, 1,250 households, and 1,228 families residing in the city.

The portion of Parker in PISD is served by Plano East Senior High School.