| Country: | Cameroon |
| Previous Election: | 1973 |
| Election Date: | 28 May 1978 |
| Next Election: | 1983 |
| Seats For Election: | All 120 seats in the National Assembly |
| Majority Seats: | 60 |
| Party1: | Cameroonian National Union |
| Leader1: | Ahmadou Ahidjo |
| Percentage1: | 100 |
| Seats1: | 120 |
| Last Election1: | 120 |
Parliamentary elections were held in Cameroon on 28 May 1978. The country was a one-party state at the time, with the Cameroonian National Union as the sole legal party. 2,618 candidates ran for a place on the CNU list, with 120 eventually winning a place on it, equal to the number seats available in the National Assembly,[1] winning all of them with a 98% turnout.[2]