Alkimos is a coastal suburb of Perth, Western Australia, located 42 kilometres (26 mi) north-northwest of Perth's central business district. It is part of the City of Wanneroo local government area.

For the most part, the suburb is covered in native banksia woodland, scrubland and heath typical of the Swan Coastal Plain. The area is part of the Alkimos-Eglinton region being considered by the State Government for a future city centre and urban region. On 5 November 2008, the WA State Government announced it was actively seeking a development partner for the project.

Alkimos lies roughly between the future Mitchell Freeway reserve to the east and the Indian Ocean to the west. The locality is bounded to the north by Eglinton, to the east by Carabooda and to the south by the newly developed suburbs of Butler and Jindalee.

Alkimos is named after the shipwreck of the Greek freighter Alkimos that ran aground on the coast nearby in 1963. The wreck lies approximately 410 metres off shore.

There are future plans for an Alkimos-Eglinton satellite city, covered by Amendment 1029/33 to the Metropolitan Region Scheme (May 2006). LandCorp estimated that 55,000 people would live in the area once it is complete, that the centre will include "hospitals, tertiary educational institutions, major retail, commercial and recreational facilities" and that stage 1 blocks would be offered for sale in 2008. The Environmental Protection Authority, however, raised concerns in November 2005 about the amendment, saying that it "would, in part, be inconsistent with the conservation and protection of significant environmental and geoheritage values in the area", and recommended that the amount of reserves be greatly increased.

Alkimos has a population of 10,203 according to the Australian Bureau of Statistics (ABS) 2021 census. The suburb was not enumerated in the 2011 census.

Amongst others there is an IGA supermarket in Alkimos Beach and a Coles supermarket in Alkimos Trinity estate. Eglinton Rocks and the Alkimos wreck can be viewed from the coastline, where almost untouched beaches are accessible by sandtrack which can be reached from the Marmion Avenue stretch. The suburb offers a wide array of native scrubland, woodland and heath, varying in condition from excellent to completely degraded, and including Xanthorrhoea preissii (traditionally known as "balga"), banksia, sheoak and Nuytsia floribunda. Some degradation has occurred due to uncontrolled vehicular access, clearing for stock grazing, fire and rabbits.

The 3 public primary schools in Alkimos are Alkimos Primary School, Alkimos Beach Primary School and Shorehaven Primary School. The public high school in Alkimos is Alkimos College, which opened to Year 7 students in 2020, and will grow to Year 12 students by 2025. Year 8 to 12 students can go to the nearby Butler College. It is expected that another public high school will be needed in Alkimos by 2024. St James Anglican School is a K–11 Anglican school in Alkimos, which will expand to Year 12 students in 2021.

In 2008, Marmion Avenue was extended through the suburb, which had previously been unserviced by the road network. In 2023, the Mitchell Freeway was extended to the southern part of the suburb, terminating at Romeo Road. Transperth operates trains to Yanchep, servicing a train station in the suburb. The bus routes in the area are operated by Swan Transit.

The Yanchep line was extended through the area with Alkimos railway station opened on the 15th of July 2024.

•    486 Alkimos Station to Butler Station – serves Marmion Avenue
•    487 Alkimos (Trinity Estate) to Butler Station – serves Benenden Avenue, Howden Parade, Piazza Link, Santorini Promenade and Hollington Boulevard
•    488 Alkimos (Trinity Estate) to Butler Station – serves Benenden Avenue
•    491 Alkimos Station to Eglinton Station – serves Marmion Avenue, Shorehaven Boulevard and Heath Avenue
•    492 Alkimos Station to Eglinton Station – serves Marmion Avenue

•    Yanchep Line
  • Alkimos Station

• Metropolitan Region Scheme Amendment 1029/33 Alkimos-Eglinton - Download (6MB)