| David O'Connell | |
| State Senate: | North Dakota |
| District: | 6th |
| Term Start: | 1989 |
| Term End: | 2016 |
| Successor: | Shawn Vedaa |
| Office2: | Minority Leader of the North Dakota State Senate |
| Term Start2: | 2003 |
| Term End2: | 2010 |
| Predecessor2: | Aaron Krauter |
| Successor2: | Ryan M. Taylor |
| State House3: | North Dakota |
| District3: | 6th |
| Term Start3: | 1983 |
| Term End3: | 1989 |
| Birth Date: | 3 June 1940 |
| Birth Place: | Elms Township, Bottineau County, North Dakota, U.S. |
| Party: | Democratic |
| Residence: | Lansford, North Dakota, U.S. |
| Alma Mater: | Minot State University-Bottineau |
| Profession: | businessman, farmer |
David Paul Maskinbak O'Connell (born June 3, 1940) is a North Dakota Democratic-NPL Party politician who represented the 6th district in the North Dakota Legislative Assembly from 1983 to 2016. He served as North Dakota Senate Minority Leader from 1989 to 2011, eventually stepping down from party leadership to spend more time with his wife, who was having health problems at the time.[1] Before serving in the Senate, he was a member of the North Dakota House of Representatives from 1983 through 1988.
O'Connell serves on the board of directors for the North Central Electric Cooperative, and is a member of the Knights of Columbus. He lives in Lansford, North Dakota.