Thornleigh crime statistics
Reporting period: 2025-07 – 2026-06
381 recorded in this period, compared with 323 in the preceding period.
LGA totals use the selected offence categories. Locality counts and population-adjusted LGA rates are different measures.
About Thornleigh
Thornleigh is a leafy residential suburb located 22 kilometres northwest of the Sydney central business district, falling within the jurisdiction of the Hornsby Shire Council. Situated on a ridge that separates the Lane Cove River valley to the east and the Berowra Creek valley to the west, the area is characterised by its undulating topography and proximity to extensive bushland reserves. The demographic profile is primarily composed of families and professionals, attracted to the area by its established housing stock and its position within the Upper North Shore region.
The suburb is well-connected by transport infrastructure, including the Thornleigh railway station on the Northern Line, which provides direct access to Sydney’s CBD and the Central Coast. Local amenities are centred around the Pacific Highway corridor, featuring a mix of retail outlets, small businesses, and light industrial zones. Recreational opportunities are supported by several community parks and sports facilities, most notably the Thornleigh Brickpit, a former industrial site repurposed into a significant multi-sport complex.
Historically, the area was part of a region known as the "Field of Mars," with early European settlement in the late 19th century driven by the extension of the main northern railway line in 1886. Much of the suburb’s early development was tied to orcharding and timber-getting before transitioning into a residential commuter suburb during the mid-20th century. While modern development has introduced higher-density residential projects, the suburb retains several pockets of heritage significance, reflecting its transition from a rural frontier to an integrated part of Sydney's metropolitan landscape.
Recorded offence categories
| Category | Current period | Previous period |
|---|---|---|
| Transport regulatory offences | 71 | 34 |
| Fraud | 60 | 65 |
| Intimidation, stalking and harassment | 24 | 20 |
| Steal from retail store | 21 | 14 |
| Domestic violence related assault | 20 | 16 |
| Steal from motor vehicle | 20 | 14 |
| Trespass | 15 | 10 |
| Malicious damage to property | 14 | 35 |
| Prohibited and regulated weapons offences | 14 | 4 |
| Break and enter dwelling | 11 | 8 |
| Other theft | 11 | 17 |
| Breach bail conditions | 10 | 4 |
| Non-domestic violence related assault | 10 | 12 |
| Breach Apprehended Violence Order | 9 | 9 |
| Other offences | 8 | 6 |
| Possession and/or use of cannabis | 8 | 4 |
| Steal from dwelling | 7 | 9 |
| Break and enter non-dwelling | 6 | 4 |
Community context
The 2021 Census recorded 8,898 residents. This is not a current population estimate.
Sources and interpretation
These are police-recorded incident or victim counts, not every unreported incident or a prediction of personal safety. Percentage changes are not tests of statistical significance; small counts need particular care.