Firefighters rushed to Waterside Close at about 11.40pm on Wednesday after reports of someone in the water.
Four engines, along with ambulance and police attended.
A spokesperson for Shropshire Fire and Rescue Service said: "At 23:37 on Wednesday, SFRS Fire Control received a call reporting an incident classified as Water Rescue in Whitchurch.
"Four fire appliances including the incident command unit and the water rescue unit were mobilised from Prees, Shrewsbury, Tweedale and Whitchurch. An Operations officer was in attendance.
"Also at the scene of the incident were: the Land Ambulance Service and the Police.
"One male rescued from water now in care of ambulance service."
Fire Control at Shropshire Fire and Rescue Service confirmed this morning that the incident was at a "residential pond with deep water".
West Midlands Ambulance Service said they were called to Waterside Close at 11.24pm
A spokesperson added: "Two ambulances, two paramedic officers, the Hazardous Area Response Team (HART) and a MERIT trauma doctor and critical care paramedic attended the scene.
"Upon arrival we found a man in a serious condition. He received treatment from ambulance staff at the scene. He was conveyed to Royal Shrewsbury Hospital for further assessment."