| Country: | Wales |
| Static Image: | Grade II listed St Anne's Church, Tonna - geograph.org.uk - 4942356.jpg |
| Static Image Caption: | St Anne's Church in Tonna. |
| Coordinates: | 51.676°N -3.772°W |
| Official Name: | Tonna |
| Population: | 2,499 |
| Population Ref: | (2011 census)[1] |
| Unitary Wales: | Neath Port Talbot |
| Lieutenancy Wales: | West Glamorgan |
| Constituency Westminster: | Neath |
| Constituency Welsh Assembly: | Neath |
| Post Town: | NEATH |
| Postcode District: | SA11 |
| Postcode Area: | SA |
| Dial Code: | 01639 |
| Os Grid Reference: | SS774990 |
| Councillor1: | Leanne Jones |
| Party1: | Labour |
Tonna (Welsh: Tonnau) is the name of a village and community in Neath Port Talbot, Wales, located to the north-east of Neath.
Immediately between Tonna and the adjoining parish of Llanilltud ("Llantwit-juxta-Neath") is a cottage once occupied by the Welsh-born engineer and naturalist Alfred Russel Wallace, who had arrived at his theory of evolution independently of Charles Darwin, with whom he later corresponded. Eventually Wallace and Darwin jointly presented the first paper on Natural Selection to the Linnean Society.
The village's rugby union team is Tonna RFC.
Once mainly agricultural fields, the name derives from the archaic Welsh tonnau, meaning lea or grassland and not, as is sometimes assumed, the modern Welsh for "waves". Some areas of pasture remain.
The electoral ward of Tonna falls within the parliamentary constituency of Neath. The ward consists of a small built-up area of Tonna village to the northwest with rest of the ward consisting of woodland and pasture. Tonna is bounded by the wards of Aberdulais to the north; Resolven to the northeast; Pelenna to the southeast; Cimla and Neath North to the southwest; and Cadoxton to the west.
In the 2017 local council elections, the electorate turnout was 43.7%. The results were:
| Candidate | Party | Votes | Status | |
|---|---|---|---|---|
| Leanne Jones | Labour | 327 | Labour hold | |
| Lee Bromham-Nichols | Plaid Cymru | 305 | ||
| Kathryn Minshull | Conservative | 107 | ||
| Nick Williams | Independent | 83 |