A data profile of the people who buy, follow and care about Costco in Australia — modelled from more than twelve digital signal sources. Costco has an estimated audience of 6,183,143 people in Australia.
The average Costco fan in Australia is 43.6 years old, more female, and lives primarily in Victoria.
The audience is concentrated in Victoria, New South Wales, Queensland.
Top brand affinities include Supermarket, Subway, The Good Guys, with strongest over-indexing on Supermarket (1.59× the country average).
Demographically, the Costco audience skews more female with an average age of 43.6, and over-indexes on personality traits such as Price Sensitivity, Convenience Orientation.
Compared to the country baseline, this audience shows distinctive patterns across 20 brand affinities and 8 regions tracked by Rascasse.
The typical Costco fan in Australia is more female, around 43.6 years old, with strong Price Sensitivity tendencies and a notable affinity for Supermarket.
The key figures that characterise the Costco profile in Australia.
70.2% are female, 29.8% are male, average age 43.6.
| Metric | Value |
|---|---|
| Female | 70.2% |
| Male | 29.8% |
| Average age | 43.6 |
| Estimated audience size | 6,183,143 |
| Age bracket | Share | % |
|---|---|---|
| 16-19 | 8% | |
| 20-29 | 18% | |
| 30-39 | 22% | |
| 40-49 | 24% | |
| 50+ | 28% |
of the worldwide Costco audience comes from Australia.
| Country | Share |
|---|---|
| United States | 53.1% |
| United Kingdom | 8.0% |
| Canada | 5.8% |
Where the Costco audience in Australia is strongest.
| # | Region | Reach | Affinity | × |
|---|---|---|---|---|
| 01 | Australian Capital Territory | ~300K | 1.93× | |
| 02 | Victoria | ~2.5M | 1.29× | |
| 03 | Western Australia | ~900K | 1.24× | |
| 04 | South Australia | ~600K | 1.16× | |
| 05 | Queensland | ~1.5M | 1.08× | |
| 06 | New South Wales | ~2M | 1.00× | |
| 07 | Northern Territory | ~10K | 0.25× | |
| 08 | Tasmania | ~20K | 0.18× |
The strongest cross-interests of the Costco audience — brands, topics and people combined.
| # | · | Interest | Category | Affinity | × |
|---|---|---|---|---|---|
| 01 | Pennywise (band) | Music & Radio | 3.33× | ||
| 02 | Belmont | Music & Radio | 3.06× | ||
| 03 | Tom Cruise | Movies & TV | 2.67× | ||
| 04 | Superman (TV series) | Movies & TV | 2.31× | ||
| 05 | The Reject Shop | Shopping | 1.87× | ||
| 06 | Appliances Online | Shopping | 1.81× | ||
| 07 | The Good Guys | Home & Garden | 1.79× | ||
| 08 | DeviantArt | Internet & Social Media | 1.78× | ||
| 09 | CapCut | Technology & Electronics | 1.77× | ||
| 10 | Walmart | Shopping | 1.71× | ||
| 11 | Harris Scarfe | Home & Garden | 1.68× | ||
| 12 | Domino's Pizza | Food & Beverages | 1.62× | ||
| 13 | TK Maxx | Shopping | 1.62× | ||
| 14 | Taste.com.au | Food & Beverages | 1.62× | ||
| 15 | Skechers | Fashion & Accessoires | 1.61× | ||
| 16 | French fries | Food & Beverages | 1.61× | ||
| 17 | Customs | Travel & Leisure | 1.60× | ||
| 18 | Supermarket | Shopping | 1.59× | ||
| 19 | Subway | Food & Beverages | 1.59× | ||
| 20 | Pizza Hut | Food & Beverages | 1.52× |
Values above 1.00× are above the country average, values below 1.00× below it.
| Trait | Cluster | Deviation | Score |
|---|---|---|---|
| Price Sensitivity | PREMIUM | 1.39× | |
| Convenience Orientation | PREMIUM | 1.30× | |
| Community Orientation | OPEN | 1.17× |
| Trait | Cluster | Deviation | Score |
|---|---|---|---|
| Risk Appetite | THRILL | 0.89× | |
| Early Adopter Mentality | POWER | 0.94× | |
| Spirituality | BALANCE | 0.97× |
Costco's target market in Australia covers an estimated 6,183,143 people, concentrated in Victoria and New South Wales.
70.2% of the Costco audience are female, 29.8% are male, with an average age of 43.6 years.
Costco fans show strongest brand affinity for Supermarket (1.59×), Subway (1.59×), and The Good Guys (1.79×) over the country average.
Costco fans in Australia are most concentrated in Victoria (reach ~2.5M), New South Wales (reach ~2M), and Queensland (reach ~1.5M). These three regions account for the largest share of the active audience.
Beyond Costco itself, the audience over-indexes on Subway (1.59×), The Good Guys (1.79×), Harris Scarfe (1.68×), and Tom Cruise (2.67×) compared to the Australia average.
Related profiles, rankings and the same audience in other markets.
Audience size is the estimated number of people in Australia who actively search for Costco. Affinity is an over-index ratio: 2.0× means the audience is twice as likely to engage with that brand or trait as the country average. Reach is the estimated number of audience members in a region. Regional and brand-affinity tables are sorted from strongest signal to weakest.
This audience profile is generated by Rascasse from anonymized search-behavior signals across Australia. For methodology see methodology. Affinity values are over-index ratios vs. the country average (1.0 = baseline). Audience sizes are estimated, not measured.
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