Dohnal (feminine Dohnalová) is a Czech surname. Notable people with the surname include:
- Darcie Dohnal (born 1972), American speed skater
- Jaroslav Dohnal, translator of Kafka, possible pseudonym of Milena Jesenská (1896–1944)
- Johanna Dohnal (1939–2010), Austrian politician
- Zdeněk Dohnal (born 1945), Czech cyclist