Faraday married Sarah Barnard, whom he met through their shared involvement in the Sandemanian Church. Their marriage was a deeply loving and supportive partnership, although they remained childless. Sarah was integral to Faraday's happiness and provided a calm and stable home environment.

Faraday was a devout member of the Sandemanian Church, a small Christian sect. His religious beliefs profoundly influenced his life and work, shaping his ethical values, humility, and dedication to truth. He viewed his scientific pursuits as a way to understand God's creation.

Faraday began to experience a decline in his mental and physical health, possibly due to mercury poisoning from his experiments. His memory began to fail and his cognitive abilities diminished.

Due to his failing health, Faraday officially retired from his position at the Royal Institution.

Michael Faraday died peacefully at his home at Hampton Court, which had been granted to him by Queen Victoria as a token of recognition for his contributions to science. He was buried in Highgate Cemetery in a simple grave, reflecting his humble nature.