Täby Municipality (Täby kommun) is a municipality north of Stockholm in Stockholm County in east central Sweden. Its seat is located in the town of Täby. Täby Municipality can be characterized as a suburb of Stockholm.

The municipality is one of few in Sweden which has approximately the same size as the original entity created out of Täby parish, when the first local government acts came into force in 1863. It has not been amalgamated with other units, but minor changes of its limits have been carried out.

For statistical purposes the municipality is divided into two non-administratve urban areas (tätort). The southern built-up area constitutes the multimunicipal [1] urban area Täby which is partly situated in Danderyd Municipality. The northern built-up area, (Täby kyrkby) is part of the bimunicipal [2] Vallentuna urban area, of which the main part constitutes the seat of Vallentuna Municipality.

The municipality is served by the Stockholm public transport system through SL. There are twelve stops on all the three branches of the narrow gauge Roslagsbanan suburban railway. There is also bus connection with the Stockholm metro as well as an extensive internal bus network.