How to read this list
Rank
Position in the Top 45, sorted by audience size from largest to smallest. Updated weekly.
Audience size
Estimated number of unique people in United States who actively engage with this audience, derived from anonymized search-behavior signals.
Country share
Share of the global audience that is active in United States. A higher value means the audience is more locally concentrated here.
Avg age
Average age in years across the people who engage with this audience in United States, derived from anonymized search-behavior signals. A dash means demographic data is not yet available.
Female share
Share of women among the people who engage with this audience in United States. 50% is gender-balanced; values above mean female-skewed, below mean male-skewed.
Ranking
| Rank | Audience | Audience size | Country share | Avg age | Female share | Subtype |
|---|---|---|---|---|---|---|
| 1 |  AutoZone |
61M | 81.9% | 41.1 | 22.2% | Car parts |
| 2 |  Advance Auto Parts |
25M | 96.7% | 42.9 | 14.4% | Car parts |
| 3 |  Mopar |
3.1M | 60.6% | 36.1 | 26.0% | Car parts |
| 4 |  LMC Truck |
1.1M | 85.3% | 41.4 | 17.2% | Car parts |
| 5 |  4 Wheel Parts |
1.1M | 87.2% | 35.2 | 19.4% | Car parts |
| 6 |  ACDelco |
592k | 40.5% | 45.1 | 26.6% | Car parts |
| 7 |  Brembo |
522k | 18.3% | 36.8 | 10.8% | Car parts |
| 8 |  Thule (automobile accessories) |
424k | 16.1% | 39.8 | 22.4% | Car parts |
| 9 |  Edelbrock |
394k | 72.0% | 43.9 | 12.7% | Car parts |
| 10 |  Thoroughbred Diesel |
311k | 95.6% | 30.5 | 16.4% | Car parts |
| 11 |  Pure Diesel Power |
270k | 96.5% | 34.3 | 42.1% | Car parts |
| 12 |  Continental AG |
259k | 5.5% | 40.9 | 14.6% | Car parts |
| 13 |  American Racing |
245k | 66.3% | 42.2 | 5.0% | Car parts |
| 14 |  4 State Trucks |
243k | 95.5% | 39.7 | 26.5% | Car parts |
| 15 |  Cooter's Place |
216k | 98.9% | 44.2 | 21.7% | Car parts |
| 16 |  Car glass |
206k | 8.5% | 41.5 | 24.7% | Car parts |
| 17 |  Smittybilt |
202k | 84.8% | 36.9 | 18.3% | Car parts |
| 18 |  Carglass |
202k | 2.3% | 37.5 | 25.8% | Car parts |
| 19 |  AutoAnything |
181k | 94.2% | 46.3 | 11.0% | Car parts |
| 20 |  Rugged Ridge |
180k | 70.2% | 36.7 | 24.1% | Car parts |
| 21 |  Denso |
177k | 15.0% | 38.8 | 24.4% | Car parts |
| 22 |  Hella |
162k | 24.0% | 39.3 | 50.5% | Car parts |
| 23 |  Sparco |
136k | 9.3% | 37.6 | 10.8% | Car parts |
| 24 |  JcrOffroad |
135k | 93.0% | 33.8 | 13.2% | Car parts |
| 25 |  The Retrofit Source Inc. |
132k | 90.5% | 32.8 | 1.8% | Car parts |
Want the full picture for any of these audiences?
Open any profile to see psychographics, top regions, peer affinities and demographic splits — all derived from the same anonymized signals.
Frequently asked questions
How is this Top 45 list compiled?
Rascasse aggregates anonymized search-behavior signals across United States and ranks each car parts by its estimated audience size. Only entries with at least 5 measured entities are listed.
How often is the list updated?
The ranking is refreshed weekly from the latest search-behavior data and re-published as a static page.
What is the largest car parts in United States?
AutoZone currently leads with an estimated audience of 61M people in United States.