For a full list of 2022 candidates, visit the MD Board of Elections website. Another great resource is vote411.org, put out by the Leauge of Women Voters.
St. Mary's County is in the 5th Congressional District and in the 29th State Legislative District.
U.S. Senate
Chris Van Hollen

U.S. House of Representatives, District 5
Steny Hoyer

https://www.hoyerforcongress.com/
Maryland Governor/Lt. Governor
Wes Moore/Aruna Miller

Maryland Comptroller
Brooke Lierman

https://www.brookelierman.com/
Maryland Attorney General
Anthony Brown

State Delegate District 29B (southern part of St. Mary's County)
Brian Crosby

State Delegate District 29C (middle part of St. Mary's County and southern part of Calvert County)
Bill Bates

https://www.billbatesfor29c.com/
County Commissioner President (whole County votes)
Natalie Weech

County Commissioner District 1 (whole County votes)
Sheila Milburn

https://www.facebook.com/SMilburn4STM
County Commissioner District 2 (whole County votes)
Brandon Russell

https://www.brandon4stmarys.com/
County Commissioner District 4 (whole County votes)
Steve Tuttle

Although it is a non-partisan position, the St. Mary's County Democrats are also supporting a candidate for Board of Education, District 1.
Marsha Williams

https://www.electmarshaboe.com/