The student officers have been recruited to increase police numbers in Derbyshire following an agreed rise in the council tax precept.
This rise was agreed by Police and Crime Commissioner Hardyal Dhindsa, following extensive consultation last year which showed support across the county for increased investment in frontline policing.
They will be deployed across the county in Glossop, Chesterfield, Buxton, Ripley, Clay Cross, Killamarsh, Matlock, Ilkeston, Derby and Swadlincote, where they will undertake a range of duties in their new roles alongside their tutor officers.
Assistant Chief Constable Kem Mehmet, said: "I’m delighted to welcome another cohort to the police and an extra 20 police officers here in the county. It shows that the Police and Crime Commissioner's promise to the people of Derbyshire is turning into a visible reality."
Constables Craig Anderson, Sophie Salloway and Sophie Wright all previously worked in the force's control room and PC Craig Peat was a custody detention officer in Derby.
The other new recruits come from a range of backgrounds, including former teachers, a personal trainer, a prison officer and the RAF.