The St. Louis, MO designated market area (DMA) is a U.S. television market serving the people in the state of Missouri. It is the 24th biggest media market by size in the United States, with a total population of 1,273,870 TV households as of the 2024-2025 television season, down -1% from that of the 2023-2024 season. The Saint Louis DMA comprises 31 counties across two states, namely, Bond, Calhoun, Clay, Clinton, Fayette, Greene, Jersey, Macoupin, Madison, Marion, Monroe, Montgomery, Randolph, St. Clair, and Washington, IL; and Crawford, Franklin, Gasconade, Iron, Jefferson, Lincoln, Phelps, Pike, Reynolds, St. Charles, St. Francois, St. Louis, St. Louis City, Ste. Genevieve, Warren, and Washington, MO.
| Season | Rank | Share | TV Homes | Change |
|---|---|---|---|---|
| 2024-2025 | 24 | 1.02% | 1,273,870 | -0.87% |
| 2023-2024 | 24 | 1.03% | 1,285,040 | +2.38% |
| 2022-2023 | 24 | 1.01% | 1,255,160 | +0.31% |
| 2021-2022 | 23 | 1.02% | 1,251,300 | +0.98% |
| 2020-2021 | 23 | 1.02% | 1,239,210 | +12.7% |
| 2019-2020 | 23 | 1.03% | 1,099,590 | -5.57% |
| 2018-2019 | 21 | 1.06% | 1,164,400 | -2.14% |
| 2017-2018 | 21 | 1.06% | 1,189,890 | -2.11% |
| 2016-2017 | 21 | 1.06% | 1,215,570 | -0.15% |
| 2015-2016 | 21 | 1.07% | 1,217,370 | -0.77% |
| 2014-2015 | 21 | 1.08% | 1,226,860 | -2.21% |
| 2013-2014 | 21 | 1.08% | 1,254,530 | +0.89% |
| 2012-2013 | 21 | 1.09% | 1,243,490 | -0.83% |
| 2011-2012 | 21 | 1.09% | 1,253,920 | -0.37% |
| 2010-2011 | 21 | 1.09% | 1,258,580 | +0.73% |
| 2009-2010 | 21 | 1.09% | 1,249,450 | -0.03% |
| 2008-2009 | 21 | 1.09% | 1,249,820 | +0.44% |
| 2007-2008 | 21 | 1.10% | 1,244,370 | +1.25% |
| 2006-2007 | 21 | 1.10% | 1,228,980 | +0.54% |
| 2005-2006 | 21 | 1.11% | 1,222,380 | +0.47% |