Coding may refer to:
- Channel coding in coding theory
- Line coding
- Computer programming, the process of designing, writing, testing, debugging / troubleshooting, and maintaining the source code of computer programs
- The process of Statistical classification of information
- Coding (social sciences), refers to an analytical process in which data, in both quantitative form (such as questionnaires results) or qualitative (such as interview transcripts) are categorised to facilitate analysis
- Coding (therapy), a controversial therapy used to treat addictions
- Legal coding, the process of creating summary or keyword data from a document. It is widely used in the legal profession to create a fast-search index or database of documents for use in litigation
- A coding strand of DNA is translated into a protein product
- Present progressive tense for Code Blue, which is a patient in Cardiac Arrest or Respiratory Arrest