Lee's Summit: Demographics & People
103,656 people call Lee's Summit home, in 40,526 households. Population grew 1.1% from 102,583 (2022) to 103,656 (2024). Median age 38.8 years. (1.8y older than Jackson County; 1.6y older than Missouri). Children under 18 are 26% of the population. Population is 77% White (non-Hispanic) and 10% Black. The community is somewhat diverse (Simpson index 0.32). 70% of households are family-led. County is gaining 4,534 residents per year (2022-2023). County health: 35% adult obesity, 16% smoke.
- 2.6 people per household (vs Missouri avg 2.4).
- 30% non-family households (singles, roommates) (vs Missouri 42%).
- 72 dependents per 100 working-age (youth + seniors / 18-64) (vs Missouri 67).
Population & Trend
Population grew 1.1% from 102,583 (2022) to 103,656 (2024) — about 1.8× the recent U.S. annual rate of ~0.6%/yr. Estimated 2026 population: ~104,747 (extrapolated at 0.5%/yr trend). Census Bureau Vintage estimate: 106,217.
| Census data vintage | 2024 |
|---|---|
| Population | 107,824 people |
| Annual growth rate · Population change | 1.1% |
| Annual growth rate · Population (2022) | 102,583 |
| Annual growth rate · Population (2024) | 103,656 |
| Annual growth rate · Population growing | Yes |
| Annual growth rate · Trend category | growing |
| Population | 103,656 people (vs Missouri 29,363) |
| Population Estimate | 106,217 |
Sources: Census ACS 5-Year 2023, Table B01003 · Refreshed 2026-04-12
Age Distribution
Median age 38.8y is 0.1 years younger than the U.S. median (38.9y). Children under 18 make up 26% — above the U.S. share of ~22%.
| Age Summary · Median age | 38.8 years (vs Missouri 37.2y) |
|---|---|
| Age Summary · Children Pct | 25.5% |
| Age Summary · Character | family-oriented |
| Age Summary · Total Pop | 103,656 |
| Age Summary · Under 18 | 26,479 |
| Age Summary · 18 To 34 | 18,860.0× |
| Age Summary · 35 To 64 | 41,541.0× |
| Age Summary · 65 Plus | 16,776 |
| Population under 18 | 26,479 |
| Median age | 38.8 years (vs Missouri 37.2y) |
Sources: Census ACS 5-Year 2024 — place-level B01001 query · Census ACS 5-Year 2023 · Refreshed 2026-04-29
Race, Ethnicity & Diversity
Of 103,656 residents, race / ethnicity breaks down by Census ACS counts (a person can identify with one or more groups). The Simpson diversity index is 0.32 (0 = single group, 1 = perfectly even distribution); this is read as somewhat diverse.
| White residents | 80,771 |
|---|---|
| Black residents | 10,470 |
| Asian residents | 2,001 |
| Hispanic or Latino residents | 5,418 |
| Diversity Index · Diversity index (Simpson) | 31.5% |
| Diversity Index · Diversity label | somewhat diverse |
| Diversity Index · Groups counted | 4 |
| Diversity Index · Largest group share | 81.9% |
| Asian population | 1.9% (at Missouri median) |
| Black population | 9.6% (vs Missouri 6.6%) |
| Hispanic or Latino population | 6.1% (vs Missouri 5.3%) |
| White (non-Hispanic) population | 77.1% (at Missouri median) |
Sources: Census ACS 5-Year 2023 · Refreshed 2026-04-12
Ancestry
Self-reported ancestry from Census ACS — what residents report as their ethnic origin, separate from race. Counts can exceed population because people can list multiple ancestries.
Top (8)
Citizenship & Origin
Where residents were born and their citizenship status (Census ACS). 0.8% are foreign-born — below the U.S. average of 13.9%. 4% have naturalized to U.S. citizenship.
| Residents born in this state | 62,053 |
|---|---|
| Residents born in another state | 36,287 |
| Share born in this state | 59.9% |
| Share born in another state | 40.1% |
| Native-born U.S. citizens | 35.0% |
| Foreign-born residents | 0.8% |
| Naturalized citizens | 4.3% |
| Total foreign-born residents | 4,362 |
| From Europe | 761 |
| From Africa | 1,819 |
| From Latin America | 157 |
| Census Foreign Born · Caribbean | 56 |
Households & Family Composition
40,526 households. Averaging 2.6 people each — matches the U.S. average of 2.5. 70% are family households — above the U.S. share of ~65%. Of 28,257 families, 35% are married couples with children.
| Children under 18 | 26,365 |
|---|---|
| Total families | 28,257 |
| Married couples with children | 9,815 |
| Single-parent households | 1,127 |
| Average household size | 2.58 |
| Women who gave birth (past year) | 12.1% |
| Grandparents living with grandchildren | 1,141 |
| Grandparents responsible for grandchildren | 353 |
| Family households | 28,223 households (vs Missouri 7,284) |
| Households that are families | 69.6% (vs Missouri 58.3%) |
| Total households | 40,526 households (vs Missouri 11,992) |
Sources: Census ACS 5-Year 2023 · Refreshed 2026-04-12
Residential Stability & Migration
How long residents have lived here and where they came from. 11.5% moved within the county in the past year — the U.S. baseline is roughly 8–10%. The surrounding county is gaining 4,534 residents per year on net (IRS migration data).
| Moved within the county (past year) | 11.5% |
|---|---|
| Migration · People moving in (annual) | 111,099 |
| Migration · People moving out (annual) | 106,565 |
| Migration · Net migration (in − out) | 4,534 |
| Migration · Population growing | Yes |
| Migration · Year | 2022-2023 |
Sources: IRS SOI Migration 2021-2022 · Refreshed 2026-04-12
Disability
Census ACS measures self-reported functional limitations — vision, hearing, mobility, cognitive, self-care, or independent-living. The U.S. baseline disability rate is about 12–13%; rates trend higher with median age.
| Residents with a disability | 4,430 |
|---|---|
| Disability rate | 4.4% |
Group Quarters
Group quarters are non-household living arrangements counted by the Census — college dormitories, nursing homes, military barracks, group homes, correctional facilities, and similar institutional or shared housing. 546 residents live in group quarters (0.5% of population).
| Living in group quarters | 546 |
|---|
Other
| Congressional District · District | 5 |
|---|---|
| Congressional District · Congress | 118th |
| Cdc Birth Rate · Fips | 29037 |
| Cdc Birth Rate · State Fips | 29 |
| Cdc Birth Rate · County Fips | 037 |
| Cdc Birth Rate · County | Cass |
| Cdc Birth Rate · Birth Rate | 15.3% |
| Cdc Birth Rate · Lower Ci | 13.40 |
| Cdc Birth Rate · Upper Ci | 17.50 |
| Cdc Mortality · Fips | 29037 |
| Cdc Mortality · County | Cass County |
| Cdc Mortality · Urban Rural | Large fringe metro |
| Cdc Mortality · Total Deaths 2020 2023 | 3,099 |
| Cdc Vaccination · Fips | 29037 |
| Cdc Vaccination · County | Cass County |
| Cdc Vaccination · Dose1 Pop Pct | 64.8% |
| Cdc Vaccination · Series Complete Pct | 55.1% |
| Cdc Vaccination · Booster Pct | 47.5% |
| Cdc Vaccination · Population 2019 | 105,780 |
| Cdc Vaccination · Metro Status | Metro |
| Family Score · Score | 10 |
| Family Score · Schools | 30 |
| Family Score · Children Pct | 25.5% |
| Family Score · Rating | excellent |
| Town Summary · Key Facts | population 103,656, growing, family-oriented, affluent, white collar |
| Town Summary · Population | 103,656 people (vs Missouri 29,363) |
| Town Summary · County | Cass County |
Sources: NCES school congressional district assignment · federal dataset cascade