• county
  • FIPS 42001
  • Largest town: Gettysburg

Adams County, Pennsylvania

Adams County had 107,914 residents in the Census Vintage 2024 estimate, on 518.6 square miles of land. It ranks 31st of 67 in Pennsylvania by population and 45th by land area.

Population
107,914
#31 of 67 in Pennsylvania · #586 in US
Area
518.6 sq mi
#45 of 67 in Pennsylvania · #2,013 in US
Density
208 / sq mi
#25 of 67 in Pennsylvania · #548 in US
Median household income
$77,041
#12 of 67 in Pennsylvania · #581 in US

Census Vintage 2024 estimates · SAIPE 2023 income · 2024 Gazetteer land area

Adams County within Pennsylvania. Pin: Harrisburg.

Measure from here

Tools and pages that start from Adams County

Adams County population, land area and income

Adams County had 107,914 residents in the Census Vintage 2024 estimate, on 518.6 square miles of land. It ranks 31st of 67 in Pennsylvania by population and 45th by land area. That works out to 208.1 people per square mile, 2.2 times the US average of 96.3, and in the top quarter nationally.

The median county-equivalent in Pennsylvania has 82,953 residents; Adams County is somewhat larger.

Its SAIPE 2023 median household income of $77,041 is in the top quarter among 3,143 counties with an estimate.

National rank among 3,144

Population

107,914

3144th1st

586th of 3,144 (US)

Land area

519 sq mi

3144th1st

2013th of 3,144 (US)

Density

208.1 / sq mi

3144th1st

548th of 3,144 (US)

Median household income

$77,041

3143rd1st

581st of 3,143 (US)

Rank within Pennsylvania (67)

Population

107,914

67th1st

31st of 67 (PA)

Land area

519 sq mi

67th1st

45th of 67 (PA)

Density

208.1 / sq mi

67th1st

25th of 67 (PA)

Median household income

$77,041

67th1st

12th of 67 (PA)

How Adams County's population changed since 2020

Adams County gained 4,112 residents between the July 2020 and July 2024 estimates, a rise of 4.0%. That ranks 4th of 67 in Pennsylvania for growth. The median Pennsylvania county changed by -0.5%, and the state as a whole by +0.6%.

Since the April 2020 estimates base, Adams County recorded 3,940 births and 5,061 deaths, a natural change of -1,121. Net international migration added +930 and net domestic migration, people moving to or from other US counties, came to +4,350. The largest single component was domestic migration, which added 4,350 people.

103.8k2020105.7k2021106.0k2022107.1k2023107.9k2024
Census Vintage 2024 county estimates for July 1 of each year. The axis starts above zero so year-to-year changes are visible.

Components of change, April 2020 to July 2024

Births
3,940
Deaths
5,061
Net international migration
+930
Net domestic migration
+4,350
Change, July 2023 to July 2024
+767

Where Adams County is

The Census internal point of Adams County is at 39.869400, -77.217700. It sits in UTM zone 18N. The map shades Pennsylvania's 67 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Adams County outlined. Dots are towns of 1,000+ people with residents in it.

Adams County: +4.0%Potter County: -2.4%Sullivan County: +1.6%Bucks County: +0.6%Carbon County: +1.5%McKean County: -2.3%Montour County: -0.1%Fulton County: -0.9%Columbia County: +2.0%Cameron County: -4.1%Elk County: -2.6%Bradford County: -0.4%Bedford County: +0.1%York County: +3.2%Monroe County: -1.1%Forest County: -5.2%Berks County: +2.4%Cambria County: -2.3%Franklin County: +2.1%Snyder County: -0.3%Somerset County: -2.5%Clarion County: -0.9%Indiana County: -0.2%Lackawanna County: +0.6%Wyoming County: -1.0%Lawrence County: -2.0%Mercer County: -2.2%Lehigh County: +3.0%Northampton County: +3.3%Cumberland County: +5.9%Fayette County: -3.6%Jefferson County: -2.5%Centre County: +1.2%Lebanon County: +1.4%Union County: -1.2%Clinton County: +1.3%Chester County: +4.8%Montgomery County: +2.6%Wayne County: +0.5%Pike County: +6.5%Susquehanna County: -0.6%Allegheny County: -1.4%Clearfield County: -2.9%Butler County: +2.7%Beaver County: -1.4%Crawford County: -2.1%Washington County: +0.5%Venango County: -1.7%Warren County: -3.0%Blair County: -2.0%Huntingdon County: -1.6%Lancaster County: +1.9%Luzerne County: +1.9%Westmoreland County: -1.0%Juniata County: -0.4%Armstrong County: -2.7%Tioga County: -0.8%Delaware County: +1.4%Northumberland County: -1.7%Mifflin County: -0.5%Lycoming County: -0.8%Perry County: +2.1%Philadelphia County: -1.7%Schuylkill County: +1.1%Dauphin County: +2.2%Greene County: -5.3%Erie County: -1.1%
Change 2020 to 2024
  1. < -2.2%
  2. < -1.0%
  3. < +0.1%
  4. < +1.9%
  5. ≥ +1.9%
no data

Orange pin: Adams County internal point. Dark pin: Harrisburg.

Internal point

Decimal
39.869400, -77.217700
DMS
39°52'9.84"N 77°13'3.72"W
UTM
18N 310329.1E 4415615.8N
Geohash
dr14ff5b1
Plus code
87F4VQ9J+QW

Towns in Adams County

9 incorporated places of 1,000+ people have residents in Adams County, 28,388 people together, or 26% of the county. Each figure counts only the part of the town inside Adams County; towns marked "part" extend into another county. The largest is Gettysburg with 8,647.

  1. 01Gettysburg8,647
  2. 02Littlestown4,917
  3. 03Carroll Valley4,050
  4. 04McSherrystown3,161
  5. 05New Oxford1,921
  6. 06Bonneauville1,806
  7. 07East Berlin1,583
  8. 08Biglerville1,256
  9. 09Abbottstown1,047
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Adams County

The Census 2024 county adjacency file lists 5 neighbors for Adams County, including 2 across a state line. The most populous is York County, PA, with 471,240 residents. Distances run between Census internal points in a straight line.

Distance to Harrisburg and the nearest big city

Harrisburg is 32.5 miles NNE of Adams County's internal point in a straight line. The nearest place of 100,000 or more is Baltimore, MD (population 568,271), 51.0 miles away. The nearest place of 10,000 or more is Hanover, PA (population 16,728), 13.0 miles away.

Adams County FIPS code

The FIPS code of Adams County is 42001: state code 42 for Pennsylvania plus county code 001. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $77,041.

Questions people ask

What is the population of Adams County, Pennsylvania?

The Census Vintage 2024 estimate for July 1, 2024 is 107,914. That is up 4,112 people (4.0%) from the July 2020 estimate of 103,802.

What is the FIPS code of Adams County?

42001. The first two digits (42) are Pennsylvania; the last three (001) identify the county.

What is the largest town in Adams County?

Gettysburg, with 8,647 residents inside Adams County in 2024.

Which counties border Adams County?

5 county-equivalents border it in the Census 2024 adjacency file: York County, PA; Frederick County, MD; Cumberland County, PA; Carroll County, MD; Franklin County, PA.

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties
  3. 03Census SAIPE 2023 state and county estimates
  4. 04Census Vintage 2024 subcounty population estimates
  5. 05Census 2024 county adjacency file
  6. 06Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.