Since 1992, the county has favored Democratic candidates in the presidential elections. Democrats are generally strongest in the northern portion of the county, which has a high Black population, while Republicans have historically dominated the western and southern parts of the county. In recent years however, Republicans have seen the western and southern portion of the county, made up of suburbs, become much more competitive. St. Louis County is a diverse, college-educated, suburban, and affluent county, with a large Black population, as well as a new influx of Asian Americans. These factors in recent years have pushed the county to become safer for Democrats. Historically, the Republican voters in this area were more moderate voters, fiscally conservative yet socially liberal. St Louis County overall is a Democratic stronghold, having voted for the Democratic presidential nominee in each election since 1992, and with increasing margins since 2000. In 2004, 2012, 2016, and 2020, it was only one of four counties in the state to vote Democratic. In 2020, Joe Biden won the county with over 60% of the vote, the best ever showing for a Democrat in the county.
since 1992 the county has favored democratic candidates in the presidential elections democrats are generally strongest in the northern portion of the county which has a high black population while republicans have historically dominated the western and southern parts of the county in recent years however republicans have seen the western and southern portion of the county made up of suburbs become much more competitive st louis county is a diverse college-educated suburban and affluent county with a large black population as well as a new influx of asian americans these factors in recent years have pushed the county to become safer for democrats historically the republican voters in this area were more moderate voters fiscally conservative yet socially liberal st louis county overall is a democratic stronghold having voted for the democratic presidential nominee in each election since 1992 and with increasing margins since 2000 in 2004 2012 2016 and 2020 it was only one of four counties in the state to vote democratic in 2020 joe biden won the county with over 60% of the vote the best ever showing for a democrat in the county