Foster
Source:
North Dakota
Foster is a low-population county in North Dakota with 3 ZIP codes, 3,210 people, and above-median household income among US counties. All data is sourced from the U.S. Census Bureau American Community Survey (ACS) 2023 5-Year Estimates.
National county placement
According to ACS 5-Year Estimates, Foster, ND sits among US counties with an above-median household income, on a low-population county population base, across a handful of delivery areas.
- Top 26%
- household income vs 3,210 US counties
- 3,210
- combined ZIP population
- 3
- USPS ZIP codes covered
- $78,282
- avg ZIP median income
Income percentile ranks this county's average ZIP median household income against 3,210 US counties with ACS income on at least one ZIP.
Foster lands in the national county income distribution as above-median household income on low-population county footing (FIPS 38031, 3 ZIPs, combined population 3,210). On this short ZIP list the county page is mainly the FIPS bridge - household ACS fields live on the primary ZIP.
Above-median income with few ZIPs: treat the top code (58421) as the primary ACS record and this county page as the FIPS bridge. Intra-county contrast is limited by construction.
Combined population stays under five thousand - this is a thin rural FIPS. Bookmark one ZIP; a multi-ZIP shortlist rarely adds signal beyond the primary code's ACS row.
Within North Dakota, Mountrail is the closest lower-income county and Barnes the closest higher-income county by average ZIP household income. Their 7 and 10 ZIP footprints are the immediate statewide comparison set for Foster. Use those locations as statewide context before treating the county average as a local-market answer.
3
Total ZIPs
3,210
Total Population
ZIP Codes in Foster
Side-by-side: Compare 58421 vs 58443 →
Frequently Asked Questions
What is the population of Foster?
Foster has a total population of 3,210 across 3 ZIP codes, based on U.S. Census Bureau ACS 2023 data.
What ZIP codes are in Foster?
Foster includes 3 ZIP codes: 58421, 58443, 58445.