As most municipalities of Sweden, Sundsvalls kommun is a result of a series of amalgamations, carried out in 1952 and in the period 1965–1974.

The number of original entities (existing in 1863) is thirteen.

Localities with more than 200 inhabitants include: This is a demographic table based on Sundsvall Municipality's electoral districts in the 2022 Swedish general election sourced from SVT's election platform, in turn taken from SCB official statistics.

[3] In total there were 76,665 Swedish citizens of voting age resident in the municipality.

Indicators are in percentage points except population totals and income.