Assumption Parish, Louisiana

Assumption Parish population, land area and income

Assumption Parish had 20,050 residents in the Census Vintage 2024 estimate, on 344.0 square miles of land. It ranks 43rd of 64 in Louisiana by population and 56th by land area. That works out to 58.3 people per square mile, below the US average of 96.3, and above the national county median.

The median county-equivalent in Louisiana has 31,591 residents; Assumption Parish is somewhat smaller.

Its SAIPE 2023 median household income of $54,511 is in the bottom quarter among 3,143 counties with an estimate.

How Assumption Parish's population changed since 2020

Assumption Parish lost 913 residents between the July 2020 and July 2024 estimates, a drop of 4.4%. That ranks 46th of 64 in Louisiana for growth. The median Louisiana county changed by -2.3%, and the state as a whole by -1.2%.

Since the April 2020 estimates base, Assumption Parish recorded 802 births and 1,135 deaths, a natural change of -333. Net international migration added +68 and net domestic migration, people moving to or from other US counties, came to -720. The largest single component was domestic migration, which removed 720 people.

Where Assumption Parish is

The Census internal point of Assumption Parish is at 29.903300, -91.065200. It sits in UTM zone 15N. The map shades Louisiana's 64 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Assumption Parish outlined. Dots are towns of 1,000+ people with residents in it.

Towns in Assumption Parish

No incorporated place of 1,000 or more people has residents in Assumption Parish. Its 20,050 residents live in smaller towns, census-designated places, or unincorporated land, which the subcounty estimates do not list at this size.

Counties bordering Assumption Parish

The Census 2024 county adjacency file lists 8 neighbors for Assumption Parish. The most populous is Ascension Parish, LA, with 133,534 residents. Distances run between Census internal points in a straight line.

• Ascension Parish

  133,534 people

  23 mi NNE

• Terrebonne Parish

  103,864 people

  42 mi SSE

• Lafourche Parish

  95,342 people

  49 mi SE

• Iberia Parish

  67,540 people

  51 mi WSW

• St. Martin Parish

  51,218 people

  36 mi WNW

• St. Mary Parish

  46,799 people

  30 mi SW

• Iberville Parish

  29,766 people

  31 mi NW

• St. James Parish

  19,110 people

  18 mi ENE

Distance to Baton Rouge and the nearest big city

Baton Rouge is 38.9 miles N of Assumption Parish's internal point in a straight line. The nearest place of 100,000 or more is Baton Rouge, LA (population 220,907), 37.3 miles away. The nearest place of 10,000 or more is Morgan City, LA (population 10,813), 15.3 miles away.

Assumption Parish FIPS code

The FIPS code of Assumption Parish is 22007: state code 22 for Louisiana plus parish code 007. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $54,511.