| Attica and Boeotia | |
| Native Name: | Νομός Ἀττικοβοιωτίας |
| Settlement Type: | Former prefecture |
| Map Caption1: | Location of municipalities within Attica and Boeotia Prefecture |
| Subdivision Type: | Country |
| Subdivision Name: | Greece |
| Subdivision Type1: | Periphery |
| Parts Type: | Subdivisions |
| Established Title: | Established |
| Established Date: | 1833 |
| Extinct Title: | Disestablished |
| Extinct Date: | 1943 |
| Seat Type: | Capital |
| Seat: | Athens |
| Unit Pref: | Metric |
| Area Rank: | List of the prefectures of Greece by area |
| Population Density Km2: | auto |
| Population Rank: | List of the prefectures of Greece by population |
| Postal Code Type: | Postal codes |
| Area Code Type: | Area codes |
Attica and Boeotia Prefecture (Greek, Modern (1453-);: Νομὸς Ἀττικοβοιωτίας) was a prefecture of Greece.
Attica and Boeotia Prefecture was first established in 1833, abolished in 1836 and split up into Attica and Boeotia, and reconstituted in 1845. The prefecture was split up again into separate Attica and Boeotia prefectures in the 1899 reform, but this was reversed in 1909. The prefecture finally ceased to exist in 1943, when it was again split up into Attica and Boeotia (FEK 223Α/26-7-1943). In 1909 the provinces of the prefecture were: Attica province, Aegina province, Megaris province, Livadia province and Thiva province (Thebes Province). The capital of the prefecture was Athens.