Clintonville is an unincorporate neighborhood in north-central Columbus, Ohio, USA with around 28,000 residents. Since Clintonville is an informal neighborhood inside of the city of Columbus, there are no formally recognized borders. The southern border is loosely defined as Arcadia Avenue or the Glen Echo Ravine. On the east, either Interstate 71 or the railroad tracks. On the west, the Olentangy River. The northern border of Clintonville is the most ambiguous, with definitions anywhere in the three-mile (5 km) stretch from Cooke Road to the southern border of Worthington. Changes in the Columbus real estate market have had a great effect on the northern border. As the cachet of the Clintonville neighborhood grew towards the turn of the 21st century, Realtors began to label homes north of Cooke Road as being in Clintonville, leading to the apparent absorption of Beechwold and nearby neighborhoods south of Worthington. It was not uncommon in the booming real estate market around the turn of the century to even find homes outside of the distinct east and west borders being sold as "Clintonville" homes. It should be stressed though, that since Clintonville and Beechwold have no official existence, the boundaries are a matter of opinion. The area also contains the former unincorporated community of Evanston, a name that was used by the Big Four Railroad as a station along its line and US Postal service until the 1920s. Clintonville includes parts of zip codes 43202 and 43214. The Post Offices at the center of each Zip code are known as Clintonville Station and Beechwold Station respectively.