Baron Baltimore

Barony of Baltimore
Creation date	1625; 399 years ago (1625)
Created by	James I
Peerage	Peerage of Ireland
First holder	Sir George Calvert
Last holder	Frederick Calvert, 6th Baron Baltimore
Remainder to	Heirs male of the body lawfully begotten
Extinction date	4 September 1771

Baron Baltimore, of Baltimore, County Longford, was a title in the Peerage of Ireland. It was created in 1625 and ended in 1771, upon the death of its sixth-generation male heir, aged 40. Holders of the title were usually known as Lord Baltimore for short.