All 50 states will draw new congressional and state legislative district lines after the 2020 census. The manner in which redistricting occurs varies from state to state.
In most states, the legislature draws new district maps. Some states have commissions charged with producing new maps instead.
In Arizona, California, Idaho, and Washington, congressional and state legislative redistricting is performed by an independent commission. Montana and Wyoming also charge an independent commission with drawing new state legislative boundaries, but do not need to draw congressional districts as they only have one seat in the House.
In Hawaii and New Jersey, redistricting is handled by a commission made up of political figures. Arkansas, Colorado, Missouri, Ohio, and Pennsylvania use a hybrid process where the state legislature draws congressional district maps and a political commission draws state legislative district maps.
For more information on the particulars of your state’s redistricting process, select it from the map: https://ballotpedia.org/Redistricting#See_also