Residential delivery area · Wisconsin
ZIP Code 53561: Merrimac, WI
ZIP code 53561 uses the postal name Merrimac, Wisconsin and lies mostly in Sauk County (72% of its land) with the rest in Columbia County (Census 2020 ZIP-county file). About 1,900 people live there (Census Bureau, ACS 2020-2024). Median household income is $91,103 (Census Bureau, ACS 2020-2024). By Census place, 2% of its land lies in Merrimac, and 2% in smaller places; 96% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Merrimac · its only residential ZIP
- County
- Sauk County (72%); Columbia County (28%)
- Census places
- Merrimac
- Micro area
- Baraboo, WI
- House districts
- WI-2 (72%), WI-6 (28%) 119th Congress, by share of land
- State
- Wisconsin
- Time zone
- Central
- Land area
- 36.5 sq mi · 51 people per sq mi
Where is ZIP code 53561?
53561 centers on 43.399°, -89.652° and covers 36.5 square miles of land plus 3.3 of water. It borders 6 ZIP codes: 53555, 53913, 53578, 53951, 53955, 53901.
The map draws ZIP code areas only. For the streets inside 53561, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 53561 compare with the rest of Sauk County?
| Measure | 53561 | In Sauk County | In WI |
|---|---|---|---|
| People (ACS 2020-2024) | 1,872 | 12th of 19 | 496th of 783 |
| Median household income | $91k | 4th of 16 | 154th of 610 |
| Median home value | $428k | 1st of 15 | 32nd of 612 |
Its median household income is higher than in 74% of U.S. residential ZIP codes, and it is denser than 43% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 53561?
The 2020 Census counted 2,016 people in 53561; the ACS, which samples households over 2020-2024, estimates 1,872. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 1,872±203 (90% margin)
- 2020 Census count
- 2,016
- Households
- 815
- Median age
- 47.3
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 53561?
Of the 1,872 people the ACS estimates in 53561, 21.5% are under 18 and 26.2% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (89.3%).
- Under 1821.5%
- 18 to 6452.3%
- 65 and older26.2%
- White, not Hispanic89.3%
- Hispanic or Latino4.8%
- Other or two or more3.2%
- Black, not Hispanic2.6%
- Asian, not Hispanic0.2%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 53561 earn?
Median household income is $91,103 (ACS 2020-2024), the 4th highest of the 16 ranked ZIP codes in Sauk County.
- Median household income
- $91,103±$14,771
- Income per person
- $51,641
- Below the poverty line
- 5.5%
- Unemployed (of the labor force)
- 3.1%
- Adults 25+ with a bachelor's degree
- 38.7%
- Adjusted gross income per tax return, 2022
- $103,2431,090 returns; wages 58% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 53561?
FHFA's house price index for 53561, built from repeat sales and appraisals of the same homes, rose 74% from 2015 to 2025 and rose 42% from 2020 to 2025, and moved −16.6% in 2025.
- Median home value (owners' estimate)
- $427,600
- Median gross rent
- $1,061
- Homes owned by their occupants
- 89.7%
- Housing units
- 1,169
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 53561?
26 business establishments had a location in this ZIP code in 2023, 4 fewer than in 2018; the most are in accommodation and food services (ZIP Code Business Patterns).
- Accommodation and food services8
- Other services (except public administration)4
- Real estate and rental and leasing3
- Health care and social assistance3
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 53561?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 53555 | Lodi | 8,933 | $119k | 7.3 mi |
| 53913 | Baraboo | 21,704 | $75k | 7.5 mi |
| 53578 | Prairie Du Sac | 6,503 | $106k | 8.5 mi |
| 53951 | North Freedom | 2,452 | $72k | 11.3 mi |
| 53955 | Poynette | 6,125 | $101k | 12.7 mi |
| 53901 | Portage | 14,291 | $74k | 14.0 mi |
| 53529 | Dane | 2,611 | $108k | 12.4 mi (near) |
| 53583 | Sauk City | 5,816 | $97k | 13.1 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.