
Northwest Ohio, orNorthwestern Ohio, consists of multiple counties in the northwestern corner of the US state ofOhio. This area bordersLake Erie,Southeast Michigan, and northeasternIndiana. Some areas are also considered theBlack Swamp area. TheToledo metropolitan area is part of the region.
Northwest Ohio's population in2000 was 1,639,144 and is declining, specifically in the northern regions (counties shaded in the darker blue and Allen County). However, southern areas, such asMarion andMorrow counties, and the city ofFindlay are growing.
Toledo is the principal city of Northwest Ohio. Most of the region's television channels and radio stations are licensed in Toledo, Perrysburg or nearby Bowling Green. Though Toledo is an industrial city, Northwest Ohio is primarily agricultural with small centers of commerce distributed across region. Since the 1970s, the population of Lucas County and the Toledo metropolitan area has declined, though Wood and Hancock counties have had moderate population growth.



| 2018 rank | City | County | 2018 estimate | 2010 Census | Change | Highest Population (Year) | Metropolitan Statistical Area |
|---|---|---|---|---|---|---|---|
| 1 | Toledo | Lucas | 274,975 | 287,208 | −4.26%[1] | 383,818 (1970) | Toledo, OH Metropolitan Statistical Area |
| 2 | Findlay | Hancock | 41,324 | 41,202 | +0.30%[1] | 41,324 (2018) | Findlay, OH Micropolitan Statistical Area |
| 3 | Lima | Allen | 36,862 | 38,771 | −4.92%[1] | 53,734 (1970) | Lima, OH Metropolitan Statistical Area |
| 4 | Bowling Green | Wood | 31,578 | 30,028 | +5.16%[1] | 31,578 (2018) | Toledo, OH Metropolitan Statistical Area |
| 5 | Perrysburg | Wood | 21,570 | 20,623 | +4.59%[2] | 21,570 (2018) | Toledo, OH Metropolitan Statistical Area |
| 6 | Sylvania | Lucas | 19,030 | 18,965 | +0.34%[3] | 19,030 (2018) | Toledo, OH Metropolitan Statistical Area |
| 7 | Tiffin | Seneca | 17,953 | 17,963 | −0.06%[4] | 21,596 (1970) | Tiffin, OH Micropolitan Statistical Area |
| 8 | Defiance | Defiance | 16,663 | 16,494 | +1.02%[5] | 16,783 (1980) | Defiance, OH Micropolitan Statistical Area |
| 9 | Fremont | Sandusky | 16,034 | 16,734 | −4.18%[3] | 18,767 (1960) | Fremont, OH Micropolitan Statistical Area |
| 10 | Maumee | Lucas | 13,722 | 14,286 | −3.95% | 15,937 (1970) | Toledo, OH Metropolitan Statistical Area |

These places are or may be classified as being in Northwestern Ohio, depending on the definition being applied:
If a city is acounty seat, it has been listed above according to the county in which it lies. Many of thecities, townships, and villages in Northwest Ohio are clustered in the ToledoMSA. This list is incomplete.

Extreme Northwest Ohio, orFar Northwestern Ohio, is a portion of Northwest Ohio best known as theGreat Black Swamp area due to its natural history. The counties ofDefiance,Fulton,Henry,Paulding,Putnam,Van Wert, andWilliams in the state ofOhio are usually classified as Extreme Northwest Ohio.
According to the2000 Census, the population of this portion of NW Ohio is 234,660. WhenAllen andHancock counties are included, the population is 414,428. Just like any other region, there is no universally agreed-upon line for Northwestern Ohio, as the entire area is defined differently by the opinions of multiple people.
| City | Population (2010 Census) |
|---|---|
| Bryan (Williams County) | 8,545 |
| Defiance (Defiance County) | 16,494 |
| Findlay (Hancock County) | 41,202 |
| Lima (Allen County) | 38,771 |
Northwest Ohio Election Results
| Year | Democratic | Republican | Third parties |
|---|---|---|---|
| 1996 | 45.04%265,560 | 42.71%251,806 | 12.25%72,248 |
| 2000 | 42.88%260,237 | 53.96%327,477 | 3.17%19,218 |
| 2004 | 44.03%310,480 | 55.54%391,676 | 0.43%3,031 |
| 2008 | 49.41%351,887 | 48.59%346,062 | 1.99%14,163 |
| 2012 | 47.81%327,682 | 49.99%342,592 | 2.20%15,076 |
| 2016 | 36.63%245,615 | 57.08%382,711 | 6.29%42,206 |
| 2020 | 37.58%264,380 | 60.58%426,121 | 1.84%12,934 |
| 2024 | 36.09%249,299 | 62.45%431,361 | 1.45%10,024 |
Local transit is available in three urban areas within Northwest Ohio. TheToledo Area Regional Transit Authority serves Toledo, theAllen County Regional Transit Authority serves Lima, and theSandusky Transit System serves Sandusky.
Toledo Express Airport (TOL), in suburbanSwanton, is the largest airport in northwest Ohio. Toledo Express is served by seven major passenger airlines, and has been named one of the five best small airports in the Midwest. Toledo Express is also a majorair cargo center, serving as the international hub forBAX Global. Toledo Express has begun a $22 million renovation project; As of 2007, the airport has expanded and renovated the central gate area of its single terminal, and is seeking an airline to offer direct service to New York City.
Toledo Express also hosts thecorporate flight departments ofOwens-Illinois,Owens-Corning,Pilkington, andDana Holding Corporation.Grand Aire Express offerscharter andair taxi services from its base at the airport. In education, the airport is a base of operations forFlightSafety International andToledo Public Schools' aviation program, with flight instruction also offered by the airport's twofixed-base operators, who also provide fuel, repair, and storage forgeneral aviation aircraft. Additionally, Toledo Express is a base forF-16 fighter jets of theOhio Air National Guard, which has provided the airport additional funding for runway lengthening and safety enhancements.
Detroit Metropolitan Airport to the north,Port Columbus International Airport to the southeast, andCleveland Hopkins International Airport to the east are the major orhub airports serving residents of Northwest Ohio. Detroit Metro is a "fortress hub" forDelta Air Lines and offers both domestic and international flights. Cleveland Hopkins is a hub forUnited Airlines and offers both domestic and international flights.
Charter and air taxi service is also available at several smaller airports, such as ToledoMetcalf Field,Findlay Airport, andLima Allen County Airport. General aviation users can also land at any one of approximately 40 public-use airports (both publicly and privately owned) in Northwest Ohio.
KFDY (Findlay Airport) has both the second and third largest runway in Northwest Ohio with runway 18/36 at 6449 x 100 ft and runway 7/25 at 5883 x 100 ft. Runway 18/36 is capable of allowing aircraft such as theBoeing 767-200 to land and then take-off atMTOW if needed. KTOL (Toledo Express) has the largest runway in Northwest Ohio at 10,600 x 150 ft, making it capable of handling nearly any aircraft at MTOW.
Interstate 90 runs east-west through the upper part of Northwest Ohio.Interstate 75 runs from the Michigan border, through Toledo, south to Findlay, Lima, and to southwest Ohio.
Amtrak serves the passenger train, theLake Shore Limited inBryan in the Extreme Northwest.Martin Luther King Jr. Plaza in Toledo andSandusky host Amtrak'sLake Shore Limited andCapitol Limited.
