通信工程（也作信息工程、电信工程，旧称远距离通信工程、弱电工程）是电子工程的重要分支，同时也是其中一个基础学科。该学科关注的是通信过程中的信息传输和信号处理的原理和应用。

通信工程研究的是，以电磁波、声波或光波的形式把信息通过电脉冲，从发送端（信源）传输到一个或多个接受（信宿）。接受端能否正确辨认信息，取决于传输中的损耗高低。信号处理是通信工程中一个重要环节，其包括过滤，编码和解码等。

通信工程所关注的频段涉及甚广。低频段，亦即低赫兹，关心的是技术声学或低频技术。高频段中关注的范围从微波或雷达系统到可见光的激光或镭射系统。微波到可见光中间的频段几乎都是通信工程的研究对象。除此之外，通信过程中所应用的媒介和技术，包括通信系统在陆上、水下、空中和宇宙空间中的应用，也是相当丰富的。

Telecommunications engineering, or telecoms engineering, is an engineering discipline that brings together all electrical engineering disciplines including computer engineering with systems engineering to enhance telecommunication systems. The work ranges from basic circuit design to strategic mass developments. A telecommunication engineer is responsible for designing and overseeing the installation of telecommunications equipment and facilities, such as complex electronic switching systems, copper wire telephone facilities,fiber optics cabling,IP data systems,Terrestrial radio link systems for conventional communications and process information. Telecommunication engineering also overlaps heavily with broadcast engineering.