| Achterhooks | |
| Also Known As: | Aachterhoeks, Achterhoek |
| Nativename: | achterhooks |
| States: | Netherlands |
| Region: | Achterhoek |
| Speakers: | 211,000 |
| Date: | 2009 |
| Ref: | e25 |
| Nation: | The Netherlands |
| Familycolor: | Indo-European |
| Fam2: | Germanic |
| Fam3: | West Germanic |
| Fam4: | North Sea Germanic |
| Fam5: | Low German |
| Fam6: | West Low German |
| Fam7: | Westphalian |
| Fam8: | Gelders-Overijssels |
| Iso3: | act |
| Glotto: | acht1238 |
| Glottorefname: | Achterhoeks |
Achterhooks (Dutch Low Saxon: in Low German; Low Saxon; German, Low; Saxon, Low pronounced as /ˈɑxtərɦoːks/; Dutch; Flemish: Achterhoeks in Dutch; Flemish pronounced as /ˈɑxtərɦuks/) is a Westphalian dialect spoken in Gelderland.
The Achterhooks language is spoken in the Netherlands in western Europe, Northeast, with speakers concentrated in Gelderland Province.
The language was recognized by the government of the Netherlands in 1996 (as being part of Low Saxonian).
The speech variety has had some growth and development, with Bible portions translated in 2002.