Täby Municipality (Täby kommun) is a municipality north of in 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-administrative urban areas (tätort). The southern built-up area constituted until 2014 the multimunicipal urban area Täby which was partly situated in Danderyd Municipality. From 2015 it is considered part of

The northern built-up area, (Täby kyrkby) is part of the bimunicipal Vallentuna urban area, of which the main part constitutes the seat of Vallentuna Municipality.

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

During the first millennium, Täby was part of the lands of the Svear, known as Svitjod. Remains from this period can be found in more than 37 runestones found in the municipality. In the north of the municipality, the remains of the 11th-century bridge known as Jarlabankes bridge, can be found. The cross on Täby's coat of arms is found on the Risbylestenen, a runestone, in the northern part of the municipality. It is said that this runestone shows the first signs of Christianity reaching this part of Europe. During the Middle Ages, Täby was part of the Attundaland region.

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