| Official Name: | Ban Na |
| Native Name: | บ้านนา |
| Native Name Lang: | th |
| Settlement Type: | District |
| Subdivision Type: | Country |
| Subdivision Name: | Thailand |
| Subdivision Type1: | Province |
| Subdivision Name1: | Nakhon Nayok |
| Subdivision Type2: | Seat |
| Subdivision Type3: | Subdistrict |
| Subdivision Type4: | Muban |
| Established Title: | District established |
| Population Total: | 67268 |
| Population As Of: | 2007 |
| Population Density Km2: | 173.2 |
| Area Total Km2: | 388.4 |
| Blank Name Sec1: | Postal code |
| Blank Info Sec1: | 26110 |
| Blank Name Sec2: | Geocode |
| Blank Info Sec2: | 2603 |
| Timezone: | ICT |
| Utc Offset: | +7 |
| Coordinates: | 14.2667°N 101.0614°W |
Ban Na (Thai: บ้านนา, in Thai pronounced as /bâːn nāː/) is a district (amphoe) in the western part of Nakhon Nayok province, central Thailand.
In the Ayutthaya era, the people of Tambon Pa Kha were elephant catchers (กองโพนช้าง), catching wild elephants to use as war elephants.
Ban Na district was established in 1903, then named Tha Chang District. As the original district office in Tambon Bang O was inconvenient for transportation and prone for flooding, the government moved the office to Suwannason Road in 1965.
When Nakhon Nayok Province was downgraded, the government transferred Ban Na District to Saraburi province. It became a district of Nakhon Nayok again on 9 May 1946 when the province was re-established.
Neighboring districts are (from the east clockwise) Mueang Nakhon Nayok and Ongkharak of Nakhon Nayok Province; Nong Suea of Pathum Thani province; and Wihan Daeng and Kaeng Khoi of Saraburi province.
The important water resource is Khlong Ban Na.
The district is divided into 10 sub-districts (tambons), which are further subdivided into 117 villages (mubans). Ban Na is a sub-district municipality (thesaban tambon) which covers parts of tambons Ban Na and Phikun Ok. There are a further 10 tambon administrative organizations (TAO).
| No. | Name | Thai | Villages | Pop. | |
|---|---|---|---|---|---|
| 1. | Ban Na | บ้านนา | 12 | 8,364 | |
| 2. | Ban Phrao | บ้านพร้าว | 12 | 5,056 | |
| 3. | Ban Phrik | บ้านพริก | 12 | 10,496 | |
| 4. | Asa | อาษา | 8 | 2,368 | |
| 5. | Thonglang | ทองหลาง | 8 | 5,185 | |
| 6. | Bang O | บางอ้อ | 14 | 4,258 | |
| 7. | Phikun Ok | พิกุลออก | 12 | 5,618 | |
| 8. | Pa Kha | ป่าขะ | 13 | 8,466 | |
| 9. | Khao Phoem | เขาเพิ่ม | 16 | 8,126 | |
| 10. | Si Ka-ang | ศรีกะอาง | 10 | 9,331 |