January[]
- 27 January
- James Cromwell is born.
February[]
- 4 February
- John Schuck is born.
March[]
- 27 March
- Austin Pendleton is born.
April[]
- 4 April
- John Patterson is born.
- 21 April
- George DiCenzo is born.
July[]
- 18 July
- James Brolin is born.
September[]
- 10 September
- Tom Ligon is born.
November[]
- 15 November
- Sam Waterston is born.
1940 in the Law & Order Universe[]
- Detective Lennie Briscoe is born
| 1939 | Production timeline | 1941 |