C. or c. may refer to:
* Century, sometimes abbreviated as ''c.'' or ''C.'', a period of 100 years
* Cent (currency), abbreviated ''c.'' or ''¢'', a monetary unit that equals of the basic unit of many currencies
* Caius or Gaius, abbreviated as ''C.'', a common Latin praenomen
*Circa, abbreviated as c. (or ca., circ., cca, and cc.) a Latin word meaning "about" or "around"
* Abbreviation ''c.'' meaning "chapter" in legal citation
* Prefix ''c''/''c.'' (and ''cc''/''cc.'') meaning "column(s)" as in-source-locator in old citations (example: "c130")
See also
* C (disambiguation)
*
* C, third letter of the English and Latin alphabets
* Samuel Taylor Coleridge (1772 – 1834), who sometimes used pen-name ''C.'', an English poet and philosopher
{{Disambiguation