Joan Nancy Ericksen (born in 1954), formerly known as Joan Ericksen Lancaster, is an American lawyer and jurist serving as a senior United States district judge of the United States District Court for the District of Minnesota.

Career output and lasting influence
Opinions attributed per year · peak 3/year
Later decisions citing those opinions, per year · peak 21/year
Minnesota District Court · 2002–
Both charts share the same year axis. Opinion counts include only opinions in our corpus attributed to this judge so far — a year at zero can mean an attribution gap, not judicial silence. Influence typically outlasts the career: citations keep climbing after the last opinion.
- Gender
- Female
- Race
- White
Prior employment
- Minnesota Supreme CourtAssociate justice · 1998–2002
Judge · 1995–1998- Private practice, Minnesota1981–1983, 1993–1995
District of MinnesotaAssistant U.S. attorney · 1983–1993
Appointments
2002–2019 · Appointed by George W. Bush (Republican)
Education
J.D. · 1981- St. Olaf CollegeB.A. · 1977