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South Carolina State Senate District 21

South Carolina State Senate District 21

South Carolina · Latest: 2024↑ D+1.6 vs 2020

Safe Democratic — 107K residents

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South Carolina State Senate District 21 is a state senate district that has a population of 107,439. In the 2024 presidential election, it voted Democratic with a margin of D+46.6. Akashic Edge tracks 5 presidential elections here, dating back to 2008.

South Carolina State Senate District 21 Presidential Election Results, 2008–2024
YearDem %Rep %MarginSwing
202472.3%25.8%D+46.6D+1.6
2020*71.7%26.8%D+44.9R+3.3
2016*71.8%23.6%D+48.2R+1.1
2012*74.7%25.3%D+49.4D+2.8
2008*72.7%26.1%D+46.6—

* Pre-2022 results projected onto current district boundaries. Actual boundaries at the time of the election may have differed.

Political Identity

What defines SC-SD-21?

It has a majority-minority electorate where racial demographics are the primary driver of partisan lean.

Similarity Explorer

Similar state senate districts

Nearest neighbors matched on the same place-page feature set used across the dossier system.
8 visible matches
Historian Query

Ask the Historian

Explore SC-SD-21's political evolution with the Historian
Automated Readout

Key Insights

High-confidence patterns distilled from this geography's election history.
  • Has voted Democratic in the last 5 presidential elections
  • Latest election (2024) was a Democratic landslide with a 46.6% margin
  • Turnout decreased by 63.9 percentage points since the previous presidential election
Race & Ancestry

Who Lives Here

A race-first Census view with ancestry expansion where source coverage is strong enough to support detail.
SC-SD-21Census ACS 2024
Census race profile
Major Census race and ethnicity groups shown as a share of total population.
Expand rows for ancestry detail
Black 52.6%White (Non-Hispanic) 37.8%Hispanic 4.8%Multiracial 2.9%Asian 1.5%Native American 0.3%
GroupSC-SD-21StateNational
Black / African American
52.6%24.8%12.2%
White (Non-Hispanic)
37.8%61.9%57.4%
Hispanic / Latino
4.8%7.4%19.3%
Multiracial / Other
2.9%3.7%4.0%
Asian
1.5%1.8%6.0%
Native American / Alaska Native
0.3%0.4%0.9%
Native Hawaiian / Pacific Islander
0.1%0.1%0.2%
Method notes

Census treats race and Hispanic/Latino origin as separate questions. Race categories other than Hispanic reflect total populations (small Hispanic overlap in Black, Asian, AIAN, NHPI). “Multiracial / Other” is derived as a non-overlapping remainder.

Detailed ancestry data unavailable for this geography.

Who lives in South Carolina State Senate District 21? 107,439 residents as of the 2020 Census.

Demographic Comparison

Demographics

Read this geography's profile in three layers: local, state (where available), and national baseline.
SC-SD-21 vs South Carolina vs National107K residents
Population & electorate

Scale, voting-age share, and this geography's footprint inside the national electorate.

Total population
Local vs state vs U.S.
107K
local
107KState 5.3MNational 334.9M
Share of U.S. population
Local vs state vs U.S.
0.03%
local
0.03%National 100%
Voting-age population
Local vs state vs U.S.
80.4%
local
80.4%State 76.0%National 75.7%
Economic profile

Income, attainment, and ownership indicators that often shape coalition structure and turnout behavior.

Median household income
Local vs state vs U.S.
N/A
local
N/AState $70,153National $83,960
Poverty rate
Local vs state vs U.S.
N/A
local
N/AState 14.1%National 12.5%
College degree
Local vs state vs U.S.
N/A
local
N/AState 32.1%National 35.6%
Homeownership
Local vs state vs U.S.
N/A
local
N/AState 71.9%National 65.2%
Community profile

Age structure, language use, and nativity signals that explain how this geography differs from state and nation.

Median age
Local vs state vs U.S.
N/A
local
N/AState 40.5 yrsNational 39.1 yrs
Age 18–29
Local vs state vs U.S.
N/A
local
N/AState 15.4%National 15.7%
Age 65+
Local vs state vs U.S.
N/A
local
N/AState 18.9%National 17.0%
Foreign born
Local vs state vs U.S.
N/A
local
N/AState 5.8%National 14.1%
Non-English at home
Local vs state vs U.S.
N/A
local
N/AState 8.4%National 22.2%
English only
Local vs state vs U.S.
N/A
local
N/AState 91.6%National 77.8%
Voter Turnout

Turnout in SC-SD-21

Estimated using 2020 Census voting-age population.
2024 Turnout
52.6%
vs Previous
-63.9pp
Voting-Age Pop
86,342
History
2008–2024
Competitiveness

How competitive is SC-SD-21?

Safe DAvg margin: D+46.6 (last 3 elections)
2008
D+46.6
2012
D+49.4
2016
D+48.2
2020
D+44.9
2024
D+46.6
Elasticity
4.5pp
margin range
Party Flips
0
last 30 years
5-Elec Avg
D+47.1

Other South Carolina State Senate Districts

45 total
NameMargin ↓
SC-SD-19D+56.0
SC-SD-42D+39.2
SC-SD-22D+29.0
SC-SD-20D+16.1
SC-SD-07D+14.9
SC-SD-45D+6.3
SC-SD-35D+3.7
SC-SD-32D+3.5
SC-SD-26D+0.8
SC-SD-40D+0.5
SC-SD-17R+1.9
SC-SD-36R+2.7
SC-SD-29R+3.0
SC-SD-39R+4.0
SC-SD-30R+6.1
SC-SD-43R+11.5
SC-SD-41R+12.5
SC-SD-44R+13.6
SC-SD-16R+15.9
SC-SD-38R+17.8
SC-SD-08R+19.3
SC-SD-46R+19.6
SC-SD-31R+20.3
SC-SD-37R+21.0
SC-SD-15R+23.2
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