An electronic symbol is a pictogram used to represent various electrical and electronic devices or functions, such as wires, batteries, resistors, and transistors, in a schematic diagram of an electrical or electronic circuit. These symbols are largely standardized internationally today, but may vary from country to country, or engineering discipline, based on traditional conventions.

The graphic symbols used for electrical components in circuit diagrams are covered by national and international standards, in particular:

The standards do not all agree, and use of unusual (even if standardized) symbols can lead to confusion and errors. Symbols usage is sometimes idiosyncratic to engineering disciplines, and national or local variations to international standards exist. For example, lighting and power symbols used as part of architectural drawings may be different from symbols for devices used in electronics.

Symbols shown are typical examples, not a complete list.

The shorthand for ground is GND. Optionally, the triangle in the middle symbol may be filled in.

Voltage text should be placed next to each battery symbol too, such as "3V".

It is very common for potentiometer and rheostat symbols to be used for many types of variable resistors and trimmers.

Optionally, the triangle in these symbols may be filled in, or a line may be drawn through the triangle (less desirable). The words anode and cathode aren't part of the diode symbols. For instructional purposes, sometimes one or two letters (A/C or A/K) are placed next to diode symbols similar to how the letters C/B/E or D/G/S are placed next to transistor symbols. "K" is often used instead of "C", because the origin of the word cathode is kathodos, and to avoid confusion with "C" for capacitors in silkscreen of printed circuit boards. Voltage text should be placed next to each zener and TVS diode symbol too, such as "5.1V".