Ullrich lived in Merdingen, Germany, from 1994 to 2002 with his partner Gaby Weiss, with whom he had a daughter, Sarah Maria, on 1 July 2003.
They moved to Scherzingen, municipality of Münsterlingen, Switzerland, in 2002.
Since separating in 2005, said to be because Weiss's reluctance to be in the limelight conflicted with Ullrich's celebrity life, Ullrich has continued to live in Scherzingen.
Weiss returned with Sarah to Merdingen.
In September 2006 Ullrich married Sara Steinhauser, sister of his former teammate and training partner, Tobias Steinhauser.
Their first child, Max, was born five weeks prematurely on 7 August 2007.
Their second son, Benno, was born on 25 January 2011.
 Their third son, Toni, was born on 31 October 2012.

In 2017, he was convicted in Switzerland of drunk driving, in relation to a 2014 car crash in which two people were injured, and received a suspended sentence of four years plus a fine of €10,000.
Issues with alcohol and drugs led to his separation from his wife Sara at the end of 2017.
 
In August 2018, incidents involving a break-in and threats to Til Schweiger, a neighbour in Mallorca, and an alleged attack on an escort in a Frankfurt hotel, led to his admission to a psychiatric hospital.
On 28 August 2019, he was required by court to pay €7,200 in damages to the assaulted escort.
Ullrich lived in Merdingen, Germany, from 1994 to 2002 with his partner Gaby Weiss, with whom he had a daughter, Sarah Maria, on 1 July 2003. They moved to Scherzingen, municipality of Münsterlingen, Switzerland, in 2002. Since separating in 2005, said to be because Weiss's reluctance to be in the limelight conflicted with Ullrich's celebrity life, Ullrich has continued to live in Scherzingen. Weiss returned with Sarah to Merdingen. In September 2006 Ullrich married Sara Steinhauser, sister of his former teammate and training partner, Tobias Steinhauser. Their first child, Max, was born five weeks prematurely on 7 August 2007. Their second son, Benno, was born on 25 January 2011.  Their third son, Toni, was born on 31 October 2012.
In 2017, he was convicted in Switzerland of drunk driving, in relation to a 2014 car crash in which two people were injured, and received a suspended sentence of four years plus a fine of €10,000. Issues with alcohol and drugs led to his separation from his wife Sara at the end of 2017.  
In August 2018, incidents involving a break-in and threats to Til Schweiger, a neighbour in Mallorca, and an alleged attack on an escort in a Frankfurt hotel, led to his admission to a psychiatric hospital. On 28 August 2019, he was required by court to pay €7,200 in damages to the assaulted escort.
Jan Ullrich