1G (disambiguation)

1G is the first-generation wireless telephone technology.

1G or 1-G may also refer to:
 * Metallothionein 1G
 * 1g Racing, manufacturer of the Rossion Q1 sports car
 * Astra 1G, a satellite operated by SES
 * SSH 1G (WA) or Washington State Route 538
 * Galileo International's IATA code
 * 1G, a model of Toyota G engine