The city of Gentry encompasses the following counties: Benton.
Gentry encompasses land area: 2.4 sq mi (6.2 km2), water area: 0 sq mi (0 km2). The elevation is 1,234 ft (376 m) above sea level. This equates to a population density of 902.1/sq mi (349.2/km2). The local time zone is Central (CST) (UTC-6).
Local area codes are 479. The Federal Information Processing Standard (FIPS) code for the city is 05-26290, which is used in computer filings when non-government agencies and contractors fulfill government contracts.