Data report
The State of US Rooftop Geocoding, 2026
Most geocoders still guess a point by interpolating along a street. We measured how much of the country can instead be resolved to an actual rooftop — from our own production index of 155,548,323 US addresses.
Figures as of 2026-07-23. Source: Weganar serving index.
Why "rooftop" is the number that matters
A geocoder's job is to turn an address into a coordinate. The cheap way is interpolation: find the street segment, then estimate a spot along it based on the house number. It's fine for a map pin, but it can land a point in the road, on the wrong parcel, or hundreds of feet from the building — a real problem for insurance underwriting, delivery, solar, and property analytics.
A rooftop (or parcel) result instead places the point on the actual structure or land parcel, using authoritative address-point, parcel, and building-footprint data. Across our index, 77.5% of addresses resolve that way today — and every rooftop or parcel result also carries the 15-digit 2020 Census block, which is what makes demographic and compliance joins possible without a separate pipeline.
Coverage isn't uniform — it's a data-availability map
Rooftop coverage tracks where authoritative parcel and address-point layers exist and have been linked. Some states are nearly complete; others are still catching up as those layers are acquired and matched. Here's how the covered states rank.
| 1. Kansas | 99.6% |
| 2. Virginia | 97.8% |
| 3. District of Columbia | 96.9% |
| 4. New Hampshire | 94.9% |
| 5. New York | 94.7% |
| 6. Michigan | 93.8% |
| 7. New Jersey | 93.6% |
| 8. Nevada | 93.4% |
| 9. Montana | 93.4% |
| 10. Massachusetts | 91.9% |
| 1. Vermont | 0.0% |
| 2. Wyoming | 0.0% |
| 3. Rhode Island | 13.6% |
| 4. South Dakota | 14.2% |
| 5. West Virginia | 31.0% |
| 6. Iowa | 38.2% |
| 7. Oklahoma | 38.7% |
| 8. Alabama | 40.1% |
| 9. Kentucky | 42.5% |
| 10. Alaska | 53.1% |
Largest states by addresses indexed
| State | Addresses | Rooftop |
|---|---|---|
| Texas | 16,565,313 | 82.2% |
| California | 9,973,012 | 86.6% |
| New York | 9,104,646 | 94.7% |
| Ohio | 8,770,978 | 76.2% |
| North Carolina | 8,398,622 | 89.4% |
| Indiana | 6,132,363 | 57.3% |
| New Jersey | 5,935,184 | 93.6% |
| Illinois | 5,477,253 | 66.7% |
| Massachusetts | 5,024,293 | 91.9% |
| Florida | 4,817,201 | 90.2% |
See every state in the full coverage table →
Methodology
- Figures are a point-in-time snapshot of Weganar's production serving index of US addresses, as of 2026-07-23.
- "Rooftop share" = points resolved to a structure/parcel location divided by all served points in that state. The remainder resolve to address points, parcel centroids, or interpolated street segments.
- Rooftop placement is derived from authoritative address-point, parcel, and building-footprint sources; the returned point's basis is labeled on every API response.
- A small fraction of records carry a malformed state field and are excluded from per-state attribution, so state totals sum to slightly less than the national figure.
- Not yet in the index: Hawaii — coverage grows as new layers are loaded.
Check coverage on your own addresses
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