Data Last Updated: July 1, 2025

Miami County, OH ZIP Codes

ZIP Codes: Shows how many general ZIP Codes, PO Boxes, Unique (Business), and Multi County ZIP Codes are associated with Miami, OH.	20 ZIP Codes (12 General, 1 PO Box, 1 Unique, & 6 Multi County) [More Details]
Area Codes: The Telephone Area Codes that are associated with Miami, OH. Area Codes are used in the North American Numbering Plan (NANP) to facilitate phone routing. There are approximately 350 area codes in use in the United States.	326, 937
Timezone: Time zone designation within the U.S. Please note that not all areas in the U.S. observe daylight saving time which can affect actual local time for this city. There are 7 standard time zones which are, from west to east: Hawaii-Aleutian, Alaska, Pacific, Mountain, Central, Eastern, Atlantic. Also included in U.S. Territories are Samoa, Guam and Palau.	Eastern
Local Time: The current local time for each timezone. If more than 1 time zone for this area, all local times will be shown. Counties can cross timezones, so more than 1 may be shown.	12:00:00 AM
Population: The population of Miami, OH from the U.S. Census 2020. Included are U.S. Citizens, permanent residents, temporary migrants, and undocumented individuals. The total population represents people who live in the city, not just those present while the Census was being completed.	108,774 [More Details]
FIPS: FIPS stands for Federal Information Processing Standards, which are a set of publicly announced standards for computer systems. A county FIPS code is a unique numeric identifier for a county in the United States, assigned by the National Institute of Standards and Technology (NIST). County FIPS codes have five digits, with the first two digits identifying the state and the last 3 indicating the county.	39109
CBSA: A Core Based Statistical Area (CBSA) is the recognized term for a region that functions around an urban core with a population of at least 10,000 people, according to the standards set by the Office of Management and Budget (OMB) in 2000. A CBSA is divided into two subsets: Metro and Micro, and these classifications are determined by population density. A Micro area is identified by a population ranging between 10,000 to 50,000, while a Metro area is defined as having a population that exceeds 50,000.	Dayton-Kettering-Beavercreek, OH
Land Area: The approximate amount of land area covered by Miami, OH in square miles. The Land Area provided by the Census Bureau is based on geographic boundaries that include the mainland, islands, inland, coastal, Great Lakes, and territorial waters associated with each city.	407 square miles
Water Area: The approximate amount of water area covered by Miami, OH in square miles. Calculations by the Census Bureau for Water Area take into account inland bodies of water, coastal regions, Great Lakes, and territorial sea waters. This encompasses features such as lakes, reservoirs, rivers, and coastal water bodies.	3 square miles
Coordinates: The latitude/longitude centroid coordinates for Miami County, OH.	-84.228837, 40.053479
Quick Link: Copy the direct link to the Miami, OHCounty page and use anywhere you like!	https://www.zip-codes.com/county/oh-miami.asp

Miami, OH ZIP Code Boundaries

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Miami County, OH Covers 20 ZIP Codes

ZIP Code	Classification	City	Population	% of Population
ZIP Code 45304 *	General	Arcanum	7,532	--
ZIP Code 45308	General	Bradford	4,488	4.13%
ZIP Code 45309 *	General	Brookville	12,050	--
ZIP Code 45312	General	Casstown	1,416	1.30%
ZIP Code 45317	General	Conover	1,018	0.94%
ZIP Code 45318	General	Covington	5,438	5.00%
ZIP Code 45322 *	General	Englewood	21,185	--
ZIP Code 45326	General	Fletcher	1,170	1.08%
ZIP Code 45337	General	Laura	1,519	1.40%
ZIP Code 45339	General	Ludlow Falls	1,169	1.07%
ZIP Code 45344 *	General	New Carlisle	17,042	--
ZIP Code 45356	General	Piqua	25,106	23.08%
ZIP Code 45359	General	Pleasant Hill	1,996	1.83%
ZIP Code 45361	P.O. Box	Potsdam	225	0.21%
ZIP Code 45365 *	General	Sidney	29,277	--
ZIP Code 45371	General	Tipp City	23,205	21.33%
ZIP Code 45373	General	Troy	36,863	33.89%
ZIP Code 45374	Unique	Troy	0	0.00%
ZIP Code 45383	General	West Milton	6,885	6.33%
ZIP Code 45424 *	General	Dayton	50,920	--

* Indicates a Multi County ZIP Code. These ZIP Codes partially cross over into Miami, OH, but will mostly cover area in a different County. Not included in % of Population calculations.

Important Miami, OH Information

Miami County, OH Covers 20 ZIP Codes. This includes 12 General ZIP Codes, 1 PO Box ZIP Codes, and 1 Unique (reserved for Business and Volume Mail Receivers). There are also 6 Multi County ZIP Codes. These records are assigned a different primary county, but they partially cover area in Miami County.

The population for Miami County is 108,774, according to the U.S. Census. Population Density is 267.26 persons per square mile. With 46,766 Housing Units, the Average Household Size is 2.45 persons. There are 44,086 Family Households with an Average Family Size of 2.88 persons. 4.36% of the population is without Health Insurance. The 61.84% Employment Rate is 2.04% above the national average of 59.8%.76,153 people aged 25+ have some educational achievement, with 24.92% (or 18,980 people) having attained a Bachelor's Degree or higher.More Demographics are available below.

There are 2 area codes serving this area including326 and 937. Miami is also located in the Eastern timezone and the current local time is shown above.

Miami is part of the Dayton-Kettering-Beavercreek, OH Core Based Statistical Area (CBSA). Its CBSA Code is 19430.It is classified as a metro area, which means the combined population is 50,000 or more (at its core).

CBSAs are defined by the OMB as geographic areas that have at least one core with a population of 10,000 or more (for a micro area) and adjacent territory with a high degree of social and economic integration. CBSA codes are commonly used to accurately file Medicare claims and to verify applicable incentives using a patient's ZIP Code.

ZIP Codes in Miami, OH have 47,616 Residential mailboxes and 2,486 Business mailboxes.There are 2,209 businesses with a total of 38,223 employees. That is an average of 17.3 employees per business. Annual payroll for these businesses is $1,816,189,000. Other Demographics

Miami County Demographic Profile

Population & People

Total Population

108,774

Income

Median Household Income

$74,175

Housing

Total Housing Units

46,766

Health

Without Healthcare Coverage

4.36%

Business & Economy

Total Businesses

2,209

Families

Total Households

44,086

Employment

Employment Rate

61.84%

Education

Bachelor's Degree or Higher

24.92%

Total Population: Total number of people from the 2020 U.S. Census for Miami, OH. This reflects the exact count of this area at that point in time, not future estimates, regardless of citizenship or immigration status. It is intended to count all persons living within the geographic area, not just those present on the day of the census.	108,774
Current Population Estimate: This field gives the estimated household population for All ZIP Codes in Miami, OH. This is derived from known delivery information, household occupancy rates, household size, and more to come up with an accurate estimation for the current population. IMPORTANT: This does not include population totals for persons in nursing homes, correctional facilities, or other institutions. This is an estimation of the household population based on US Postal Service delivery information.	116,468
Total Households: Total number of Households from the 2020 U.S. Census for Miami, OH. A Household includes everyone living in a residential housing unit. This includes families, roommates in a single residence, or a person living alone.	44,086
Total Housing Units: The total number of Housing Units is the number of occupied units + the number of vacant units. Ownership is defined by whether the unit is occupied by an owner or by a tenant. Owner occupancy means that the owner lives in the unit. This value comes from the 2020 U.S. Census and is not a projection or estimate.	46,766
Average Household Size: The Average Household Size, is obtained by dividing the number of people in Households (excluding those in group quarters, nursing home, prisons, and dorm rooms) by the number of Households. A Household includes everyone living in a residential unit. Those who do not live in a household are classified as living in group accommodation. This value is an estimate from the U.S. Census ACS (American Community Survey) and is updated yearly.	2.45
Average Family Size: Average Family Size is calculated by dividing the number of people in a Family Household by the number of Family Households. The U.S. Census Bureau defines family households as households consisting of two or more individuals who are related by birth, marriage, or adoption. They also may include other unrelated people. Non-family households consist of people who live alone or who share their residence with unrelated individuals. The Average Family Size only looks at the households classified as Family Households. This value is an estimate from the U.S. Census ACS (American Community Survey) and is updated yearly.	2.88

Other Miami Demographics

# Residential Mailboxes: The number of active residential delivery mailboxes and centralized units. This excludes PO Boxes and all other contract box types.	47,616
# Business Mailboxes: The number of active business delivery mailboxes and centralized units. This excludes PO Boxes and all other contract box types.	2,486
Total Delivery Receptacles: The total number of delivery receptacles. This includes curb side mailboxes, centralized units, PO Boxes, NDCBU, and contract boxes. This count is for Residential and Business combined.	53,597
Single Family Delivery Units: Total count of single family mail delivery receptacles; generally analogous to homes.	42,118
Multi Family Delivery Units: Total count of multifamily mail delivery receptacles; generally analogous to apartments.	1,558

# of Businesses: The total number of Business Establishments. Data taken from Business Census 2023.	2,209
1st Quarter Payroll: The total payroll for the first quarter. Data taken from Business Census 2023.	$430,248,000
Annual Payroll: The total annual payroll . Data taken from Business Census 2023.	$1,816,189,000
# of Employees: The total number of employees for all ZIP Codes in this City. Data taken from Business Census 2023.	38,223

Sum of all ZIP Codes assigned Miami, OH as their primary County.

References

U.S. Postal Service [Last Updated: 7/1/2025], https://www.usps.com
ZIP-Codes.com Internal Data Creation [Last Updated: 7/1/2025], https://www.zip-codes.com
U.S. Geological Survey [Updated as needed], https://www.usgs.gov
U.S. Census [Updated Yearly], https://www.census.gov
U.S. Census 2020 [Decennial] [Last Updated: 5/25/2023], https://www.census.gov