Arnold, MD Demographics

A map of Arnold's Population by Race

Arnold, Maryland has an estimated population of 24,303, a less than 1% change from the 24,064 recorded in the 2020 Census. The population is 76.9% White, 9.7% Hispanic, 5.8% Multiracial, 3.8% Black, 3.3% Asian, and 0.6% Native American/Other. This demographic dot map shows the population of Arnold, with one dot drawn for each person counted by the Census, color-coded by race.

Arnold has become more racially diverse since the 2020 Census. It is considerably less diverse than Maryland overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Arnold, that probability was 34.5% in 2020 and 39.3% in the most recent ACS estimates.

Arnold is ranked the 60th most populous place in Maryland, out of 536 places. This ranking is based on the Census definition of a place, which includes incorporated places like cities, towns, and villages, as well as unincorporated census-designated places (CDPs). Arnold was ranked the 62nd most populous place in the 2020 Census.

Arnold's White Population

18,696 residents of Arnold, or 76.9% of the population, identify as White. The share of White residents in Arnold is significantly higher than in Maryland overall, where 46.6% of the population is White. Arnold ranks 235th statewide in terms of White residents as a share of the population, out of 536 places.

Since the 2020 Census, Arnold's White population has declined by an estimated 3.3%. White residents' share of Arnold's population has decreased from 80.4% to 76.9%.

Arnold is more White than neighboring Naval Academy (56.4% White), and Annapolis (57.3% White). Arnold is less White than neighboring Cape St. Claire (79.9% White), Lake Shore (87.6% White), and Herald Harbor (81.4% White).

Arnold's Black Population

916 residents of Arnold, or 3.8% of the population, identify as Black. The share of Black residents in Arnold is significantly lower than in Maryland overall, where 28.9% of the population is Black. Arnold ranks 328th statewide in terms of Black residents as a share of the population, out of 536 places.

Since the 2020 Census, Arnold's Black population has declined by an estimated 18.0%. Black residents' share of Arnold's population has decreased from 4.6% to 3.8%.

Arnold is more Black than neighboring Lake Shore (1.6% Black), and Herald Harbor (2.8% Black). Arnold is less Black than neighboring Cape St. Claire (4.1% Black), Naval Academy (8.7% Black), and Annapolis (20.2% Black).

Arnold's Asian Population

797 residents of Arnold, or 3.3% of the population, identify as Asian. The share of Asian residents in Arnold is slightly lower than in Maryland overall, where 6.5% of the population is Asian. Arnold ranks 169th statewide in terms of Asian residents as a share of the population, out of 536 places.

Since the 2020 Census, Arnold's Asian population has grown by an estimated 3.1%. Asian residents' share of Arnold's population has remained roughly unchanged at 3.3%.

Arnold is more Asian than neighboring Lake Shore (1.9% Asian), Annapolis (3% Asian), and Herald Harbor (0% Asian). Arnold is less Asian than neighboring Cape St. Claire (3.6% Asian), and Naval Academy (7% Asian).

Arnold's Hispanic Population

2,347 residents of Arnold, or 9.7% of the population, identify as Hispanic. The share of Hispanic residents in Arnold is slightly lower than in Maryland overall, where 12.5% of the population is Hispanic. Arnold ranks 241st statewide in terms of Hispanic residents as a share of the population, out of 536 places.

Since the 2020 Census, Arnold's Hispanic population has grown by an estimated 69.3%. Hispanic residents' share of Arnold's population has increased from 5.8% to 9.7%.

Arnold is more Hispanic than neighboring Cape St. Claire (4.9% Hispanic), Lake Shore (3.9% Hispanic), and Herald Harbor (8.8% Hispanic). Arnold is less Hispanic than neighboring Naval Academy (20.3% Hispanic), and Annapolis (14.8% Hispanic).

Arnold's Native American/Other Population

141 residents of Arnold, or 0.6% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Arnold is comparable to the share in Maryland overall, where 0.8% of the population is Native American/Other. Arnold ranks 300th statewide in terms of Native American/Other residents as a share of the population, out of 536 places.

Since the 2020 Census, Arnold's Native American/Other population has declined by an estimated 5.4%. Native American/Other residents' share of Arnold's population has remained roughly unchanged at 0.6%.

Arnold is more Native American/Other than neighboring Cape St. Claire (0.2% Native American/Other). Arnold is less Native American/Other than neighboring Naval Academy (2.5% Native American/Other), Lake Shore (0.9% Native American/Other), Annapolis (0.7% Native American/Other), and Herald Harbor (1% Native American/Other).

Arnold's Multiracial Population

1,406 residents of Arnold, or 5.8% of the population, identify as Multiracial. The share of Multiracial residents in Arnold is comparable to the share in Maryland overall, where 4.6% of the population is Multiracial. Arnold ranks 128th statewide in terms of Multiracial residents as a share of the population, out of 536 places.

Since the 2020 Census, Arnold's Multiracial population has grown by an estimated 8.1%. Multiracial residents' share of Arnold's population has remained roughly unchanged at 5.8%.

Arnold is more Multiracial than neighboring Naval Academy (5.1% Multiracial), Lake Shore (4% Multiracial), and Annapolis (3.9% Multiracial). Arnold is less Multiracial than neighboring Cape St. Claire (7.4% Multiracial), and Herald Harbor (5.9% Multiracial).

Sources: Most recent population estimates are from the 2020-2024 American Community Survey 5-Year Estimates. 2020 population counts and map data are from 2020 Census State Redistricting Data. Geographic data are from Census TIGER/Line Shapefiles.