Sommerfeld as a surname may refer to:

• Arnold Sommerfeld (1868–1951), German physicist
• Felix A. Sommerfeld (1879–after 1930), German secret service agent
• Sara Sommerfeld (born 28 October 1977), Swedish actress

Sommerfeld as a place may refer to:

• Sommerfeld, the German name of Lubsko, Poland
• Sommerfeld, a small town, now a district of Leipzig, Germany

Sommerfeld may also refer to:

• Sommerfeld (crater), a large lunar crater
• Sommerfeld radiation condition, used to solve the Helmholtz equation
• Sommerfeld Tracking, a prefabricated airfield surface, nicknamed 'tin lino'
• Sommerfeld–Kossel displacement law, in atomic physics
• Grimm–Sommerfeld rule, in quantum chemistry
• Dr. Sommerfeld – Neues vom Bülowbogen, a German television series