Nacogdoches is located at 31°36'11" North, 94°39'19" West (31.603056, -94.655278).
According to the United States Census Bureau, the city has a total area of 25.29 mi2 (65.50 km2). 25.23 mi2 (65.33 km2) of it is land and 0.06 mi2 (0.16 km2) of it is covered by water. The total area is 0.25% water.
Nacogdoches is located in the Central Standard Time (CST) timezone, GMT-06:00. It observes Daylight Saving Time (DST).