Denison, TX

ZIP code 75021 is associated with Denison, in Grayson County, north Texas, near the Oklahoma border. Its most prominent landmark is the Eisenhower Birthplace State Historic Site, where Dwight D. Eisenhower was born in 1890. The site preserves the historic house and presents exhibits about his early life. The ZIP code is primarily used for postal delivery rather than representing a large residential area.