1C

1C or 1c may also refer to:
 * 1C Company, Russian software company
 * 1 Cup (unit)
 * California Proposition 1C (2009), a defeated California ballot proposition
 * Cent (currency)
 * 1 cent euro coins
 * Penny (United States coin)
 * Penny (Irish decimal coin)
 * expression of genome size
 * First Cambridge Catalogue of Radio Sources
 * measure of charge rate for an electric battery
 * National Highway 1C, an Indian highway