Kingi said the bus driver did an amazing job getting the bus off the road safety and recovered it from almost rolling over.
"No one was hurt, thank god. The bus driver was stuck after the accident happened and two young guys helped.
"It was amazing how everyone on that bus last night was supportive with each other and took care of one another," she said.
Inspector Ian Brooker said police were alerted to the incident at Ohaaki, 35km north-east of Taupō, at 11.24pm.
The incident occurred on State Highway 5 near the intersection with Piripiri Rd.
The bus driver suffered an arm injury, but no passengers were hurt.
The bus was left undriveable after the collision and the cow was killed.