Electoral district of Nepean
| Nepean Victoria—Legislative Assembly | |||||||||||||||
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Interactive map of electoral district boundaries from the 2022 state election | |||||||||||||||
| State | Victoria | ||||||||||||||
| Created | 2002 | ||||||||||||||
| MP | Vacant | ||||||||||||||
| Party | Liberal Party | ||||||||||||||
| Namesake | Point Nepean | ||||||||||||||
| Electors | 49,653 (2018) | ||||||||||||||
| Area | 387 km2 (149.4 sq mi) | ||||||||||||||
| Demographic | Mixed rural and urban | ||||||||||||||
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The electoral district of Nepean is an electorate of the Victorian Legislative Assembly covering the southernmost part of the Mornington Peninsula in Victoria, Australia. It is named after Point Nepean which is contained within the electorate.
The seat was created prior to the 2002 Victorian state election as a replacement for Dromana. Like its predecessor, historically it had been a relatively safe seat for the Liberal Party, although Labor came within 0.2% of winning it in 2002. In 2018, however, it was swept up in the massive Labor wave that swept through eastern Melbourne, with Chris Brayne succeeding retiring longtime Liberal incumbent and former minister Martin Dixon. Brayne is only the second Labor member ever to win the seat in either of its incarnations.
Brayne was defeated in 2022 by former tennis player Sam Groth. In turn, Groth resigned from the seat in February 2026, just nine months out from the 2026 Victorian state election, causing the 2026 Nepean state by-election.
The seat has the oldest median age of any electorate in the state.