Despite being named after two towns in the area, neither Serpentine nor Jarrahdale function as either the Shire's largest settlement (Byford) or the seat of government (Mundijong).

[2] Following the 2021 Shire of Serpentine-Jarrahdale local government election, councillor for the North Ward, Rob Coales, led calls for an investigation into fraud during the election.

[7] The election saw previous North ward councillor Rob Coales defeat incumbent Michelle Rich with 2,182 votes (69.8%).

[8] Following the election, the council's current composition is shown below:[9][10] The Shire was previously split into four wards, named Byford, Central, North West and South.

[15] The suburbs, towns and localities of the Shire of Serpentine-Jarrahdale with population and size figures based on the most recent Australian census:[16][17] As of 2024[update], 125 places are heritage-listed in the Shire of Serpentine-Jarrahdale,[31] of which five are on the State Register of Heritage Places.