7.4 % of the addresses in Graz, 3,346 of 45,186, lie in a mapped flood area up to 300 years, up to 42.5 % in Innere Stadt, the highest share of the 17 districts. Gösting follows at 14.2 %, Liebenau at 13.9 % and Andritz at 13.6 %. In the 30- or 100-year flood area the city share is 4.7 %, and Eggenberg has 0 addresses in any mapped flood area.
For each address in the city of Graz, we checked whether its point in the address register lies inside a flood area on the maps of the federal ministry BMLUK. The maps show three areas. In the 30-year (HQ30) and the 100-year area (HQ100), the maps expect a flood on average once in 30 or once in 100 years. The 300-year area (HQ300) adds the rare, extreme floods. The story compares the 17 districts of Graz and their neighbourhoods, statistical areas of Statistik Austria, each named after one of its streets.
45,186 addresses. 17 districts. 210 neighbourhoods with at least 60 addresses.
How many addresses in Graz lie in a flood area?
Across the city, 3,346 addresses lie in a mapped flood area up to 300 years, 7.4 % of the total. In the 30- or 100-year flood area, where the maps expect floods more often, the city has 2,133 addresses, or 4.7 %. Most addresses in Graz lie outside all three areas.
Which district of Graz has the largest share in a flood area?
Innere Stadt has the highest share of the 17 districts, 42.5 %, with 358 of its 842 addresses in a mapped flood area. Almost all of them lie in the 30- or 100-year area, 353 addresses or 41.9 %. Gösting follows with 14.2 %, 264 of 1,854 addresses, and Liebenau with 13.9 %, 463 of 3,341. Andritz has 13.6 % and Sankt Leonhard 13.2 %. Innere Stadt stands at about three times the share of Gösting.
| District | Addresses in a mapped flood area (up to 300 years) | Addresses |
|---|---|---|
| Innere Stadt | 42.5 % | 358 of 842 |
| Gösting | 14.2 % | 264 of 1,854 |
| Liebenau | 13.9 % | 463 of 3,341 |
| Andritz | 13.6 % | 643 of 4,728 |
| Sankt Leonhard | 13.2 % | 209 of 1,583 |
| Jakomini | 11.9 % | 332 of 2,798 |
| Sankt Peter | 8.5 % | 300 of 3,546 |
| Mariatrost | 5.3 % | 137 of 2,597 |
| Waltendorf | 5.3 % | 139 of 2,628 |
| Wetzelsdorf | 4.8 % | 128 of 2,642 |
| Geidorf | 4.7 % | 128 of 2,709 |
| Straßgang | 3.8 % | 153 of 4,075 |
| Ries | 3.3 % | 51 of 1,555 |
| Lend | 1.4 % | 31 of 2,288 |
| Puntigam | 0.3 % | 7 of 2,534 |
| Gries | 0.1 % | 3 of 2,571 |
| Eggenberg | 0.0 % | 0 of 2,895 |
| All of Graz | 7.4 % | 3,346 of 45,186 |
Which district of Graz has the most addresses in a flood area?
Andritz, with 4,728 addresses, holds the most addresses in a flood area, 643, or 19.2 % of all such addresses in Graz. In the 30- or 100-year area, Andritz has 525 addresses, 24.6 % of the city's addresses in that area. Its own share there is 11.1 %.
Where in Graz do the 30- and 100-year flood areas reach?
In the 30- or 100-year flood area, Innere Stadt again leads with 41.9 %. Gösting follows with 12.9 %, Sankt Leonhard with 11.8 % and Andritz with 11.1 %. Sankt Peter has 5.9 % and Jakomini 5.4 %, while the other districts stay below 5 %. Innere Stadt, Gösting, Sankt Leonhard and Andritz hold most of the city's addresses in the 30- and 100-year flood areas.
| District | Addresses in a 30- or 100-year flood area | Addresses |
|---|---|---|
| Innere Stadt | 41.9 % | 353 of 842 |
| Gösting | 12.9 % | 239 of 1,854 |
| Sankt Leonhard | 11.8 % | 187 of 1,583 |
| Andritz | 11.1 % | 525 of 4,728 |
| Sankt Peter | 5.9 % | 209 of 3,546 |
| Jakomini | 5.4 % | 152 of 2,798 |
| Waltendorf | 4.8 % | 127 of 2,628 |
| Mariatrost | 3.2 % | 83 of 2,597 |
| Geidorf | 2.4 % | 66 of 2,709 |
| Straßgang | 2.4 % | 99 of 4,075 |
| Wetzelsdorf | 2.0 % | 54 of 2,642 |
| Ries | 1.9 % | 30 of 1,555 |
| Lend | 0.3 % | 6 of 2,288 |
| Liebenau | 0.1 % | 2 of 3,341 |
| Eggenberg | 0.0 % | 0 of 2,895 |
| Gries | 0.0 % | 0 of 2,571 |
| Puntigam | 0.0 % | 1 of 2,534 |
| All of Graz | 4.7 % | 2,133 of 45,186 |
Liebenau shows the largest gap between the two measures. In a flood area up to 300 years, Liebenau ranks third at 13.9 %, 463 addresses. In the 30- or 100-year area it holds 2 addresses, or 0.1 %. Almost every address of Liebenau in a flood area lies in the 300-year area alone. Jakomini has 11.9 % in a flood area up to 300 years and 5.4 % in the 30- or 100-year area.
Which districts of Graz have the fewest addresses in a flood area?
Eggenberg, with 2,895 addresses, has 0 addresses in any mapped flood area. Gries has 3 of 2,571, or 0.1 %, and Puntigam 7 of 2,534, or 0.3 %. In the 30- or 100-year area, Gries has 0 addresses and Puntigam 1. Lend also stays low, with 1.4 % in a flood area up to 300 years and 6 addresses in the 30- or 100-year area. These four districts lie among the five lowest in both tables.
Which neighbourhoods of Graz have the highest share in a flood area?
Among the 210 neighbourhoods with at least 60 addresses, the Schmiedgasse area has the highest share, 84.2 %, with 85 of 101 addresses in a mapped flood area. The Jakominiplatz area follows with 80.8 %, 97 of 120. Both lie in Innere Stadt, and the Neutorgasse area, also in Innere Stadt, reaches 58.3 %. Outside Innere Stadt, the Jakoministraße area in Jakomini has 62.9 %, the Zanklstraße area in Gösting 61.2 % and the Grazer Straße / Am Arlandgrund area in Andritz 60.8 %. Andritz places three neighbourhoods among the ten. Beside the Grazer Straße / Am Arlandgrund area, they are the Prochaskagasse area at 54.3 % and the Lindengasse area at 43.9 %.
| Neighbourhood | Addresses in a mapped flood area (up to 300 years) | Addresses |
|---|---|---|
| Schmiedgasse areaInnere Stadt | 84.2 % | 85 of 101 |
| Jakominiplatz areaInnere Stadt | 80.8 % | 97 of 120 |
| Jakoministraße areaJakomini | 62.9 % | 78 of 124 |
| Zanklstraße areaGösting | 61.2 % | 104 of 170 |
| Grazer Straße / Am Arlandgrund areaAndritz | 60.8 % | 138 of 227 |
| Neutorgasse areaInnere Stadt | 58.3 % | 98 of 168 |
| Prochaskagasse areaAndritz | 54.3 % | 108 of 199 |
| Auersperggasse areaGeidorf | 46.1 % | 71 of 154 |
| Beethovenstraße areaSankt Leonhard | 45.1 % | 46 of 102 |
| Lindengasse areaAndritz | 43.9 % | 47 of 107 |
| All of Graz | 7.4 % | 3,346 of 45,186 |
In which neighbourhoods of Graz does every address lie outside the flood areas?
In 103 of the 210 neighbourhoods, about half of those we compare, every address lies outside the mapped flood areas. The Zeppelinstraße area in Puntigam, with 363 addresses, and the Westbahngasse area in Straßgang, with 333, are among them. So is the Weizbachweg area in Andritz, the district with the most flood-area addresses.
How do I find the flood area of one address?
On the map of Graz, you enter an address, and its report names the flood area it lies in and the hazard zones around it. The method explains how a flood area lowers LAGE. On the page your priorities, you weight the parts of LAGE yourself. The profile of Graz sets these figures beside road noise, public transport and parks.
How we counted
The flood areas come from the flood risk zones of the federal ministry BMLUK under the EU Floods Directive, as of 2026. The address register of the BEV gives every address, and each address counts once, however many flats it has. An address counts in a flood area when its point lies inside it. The maps show where rivers and streams spread in a flood of each size. Heavy rain running over the surface and rising groundwater are separate hazards that these maps leave out. The neighbourhood ranking includes neighbourhoods with at least 60 addresses.