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Seneca County is a county located in the northwestern part of the U.S. state of Ohio. As of the 2020 census, the population was 55,069. Its county seat is Tiffin. The county was created in 1820 and organized in 1824. It is named for the Seneca Indians, the westernmost nation of the Iroquois Confederacy, which was based in present-day New York but had territory into Pennsylvania and Ohio. Seneca County comprises the Tiffin, OH Micropolitan Statistical Area, which is also included in the Findlay-Tiffin, OH Combined Statistical Area. This was long occupied by a succession of indigenous peoples. French, British and American fur traders established relations with them through and after the colonial period.
The county was barely inhabited by European Americans until the 1830s, but this period was one of migration by settlers from New York and New England. The migration was stimulated by completion of the Erie Canal through New York, which connected the markets by the Great Lakes to the Hudson River and New York City. By 1860 the population of Seneca County had increased to about half the current number of residents. It was developed for agriculture, and grew slowly thereafter It had some periods of more marked increase towards the end of the 19th century, during the Great Depression and the post–World War II baby boom. In 1980 it was censused at 61,901, and has been declining since. Since about 2000, the county's population declines by about 100–300 persons annually, mainly due to a migration deficit of about 300 persons annually. This decline is projected to continue in the future.
1824
55,069
551
1.8
Aigler Alumni Building, formerly the College Hill School, is a historic building in Tiffin, Ohio, that was listed in the National Register on February 12, 1979. It is one of ten buildings on the Heidelberg University campus listed on the National Register of Historic Places.
The building is named for alumni Allan G. Aigler, Class of 1902, who was a trustee of the university from 1926–1960. The Aigler Alumni Building was purchased by Heidelberg University from the Tiffin City Board of Education in 1961, and was outfitted for use as a classroom, office, and laboratory building. It had previously functioned as an elementary school. In 2010 the Graduate Studies Office, psychology, criminal justice and political science moved into the building when the School of Business moved into the newly remodeled Adams Hall.
Attica City Hall • 20 S Main St • Attica • (419) 426-9611
Augdon Newspapers Of Ohio Inc • 320 Nelson St • Tiffin • (419) 448-3200
Avr Fire District • 221 S Main St • Attica • (419) 426-8862
Bascom Joint Fire District • 5960 W Tiffin St • Bascom • (419) 937-2006
Beeghly Library • 10 Greenfield St • Tiffin • (419) 448-2104
Bettsville Police Dept • 308 Emma • Bettsville • (419) 986-5748
Bettsville Public Library • 233 State St • Bettsville • (419) 986-5198
Bettsville Volunteer Fire Dept • 308 Emma St • Bettsville • (419) 986-5141
Bliss Memorial Library • 20 S Marion St • Bloomville • (419) 983-4675
Bloomville Village Police Dept • 10 Beeghly Ave • Bloomville • (419) 983-4745
City Of Tiffin • 51 E Market St # 2 • Tiffin • (419) 448-5402
City Of Tiffin Water Poll • 961 N Water St • Tiffin • (419) 448-5440
Crosswaeh Community Based • 3055 S State Route 100 • Tiffin • (419) 447-1444
Fire & Ambulance Dept • 53 S Monroe St • Tiffin • (419) 448-5444
Fostoria Fire Div • 233 W South St • Fostoria • (419) 435-3206
Fostoria Library • 205 Perry St • Fostoria • (419) 435-2813
Fostoria Police Dept • 213 S Main St • Fostoria • (419) 435-8573
Green Springs Police Dept • 120 Catherine St • Green Springs • (419) 639-2211
Green Springs Rural Volunteer • 116 Catherine St • Green Springs • (419) 355-7815
Green Springs Rural Volunteer • 120 Catherine St • Green Springs • (419) 639-2222
Kansas Fire & Rescue • 5980 W State Route 635 • Kansas • (419) 986-5750
Kaubisch Memorial Pubc Library • 205 Perry St • Fostoria • (419) 435-1071
Mercy Health-Tiffin Hospital • 45 St Lawrence Dr • Tiffin • (419) 455-7000
Natural Resources Conservation • 3140 S State Route 100 # D • Tiffin • (419) 447-7073
New Riegel Fire Dept • 13 W Findlay St • New Riegel • (419) 595-2648
New Riegel NBS Fire District • 7971 County Road 10 • New Riegel • (419) 595-2648
Ohio Department-Rehab • 111 N Washington St • Tiffin • (419) 448-0004
Ohio State • 621 E Market St • Tiffin • (419) 447-0967
Probate Court • 103 E Market St • Tiffin • (419) 447-4434
Republic Fire House • 103 Center St • Republic • (419) 585-6600
Republic Police Dept • 219 Washington St • Republic • (419) 585-5981
Scipio-Republic Fire Dept • 103 Center St • Republic • (419) 585-6600
Seneca County • 3140 S State Route 100 # F • Tiffin • (419) 447-7674
Seneca County Sheriff's Office • 3040 S State Route 100 • Tiffin • (419) 447-3456
Seneca County Treasurers Ofc • 109 S Washington St # 2105 • Tiffin • (419) 447-1584
Seneca East Public Library • 14 N Main St • Attica • (419) 426-3825
Sewer Revenue • 51 E Market St # 1 • Tiffin • (419) 448-5429
Sojourn At Seneca Senior • 50 St Lawrence Dr • Tiffin • (567) 207-2230
State Of Ohio • 600 N River Rd • Tiffin • (419) 455-9319
Tiffin Developmental Ctr • 600 N River Rd • Tiffin • (419) 447-1450
Tiffin Fire Dept • 53 S Monroe St • Tiffin • (419) 448-5448
Tiffin Police Dept • 51 E Market St • Tiffin • (419) 447-2323
Tiffin Seneca Public Library • 77 Jefferson St • Tiffin • (419) 447-3751
Transportation Department • 3390 S State Route 100 • Tiffin • (419) 447-0967
US Army National Guard • 500 Riverside Dr • Tiffin • (419) 447-4922
US Farm Svc Agency • 3140 S State Route 100 # C • Tiffin • (419) 447-7071
USPS • 12125 W County Road 10 • Alvada • (419) 595-2744
USPS • 7 S Main St • Attica • (419) 426-4332
USPS • 5755 W Tiffin St • Bascom • (419) 937-2616
USPS • 203 State St • Bettsville • (419) 986-5384
USPS • 10 S Marion St • Bloomville • (419) 983-3101
USPS • 15909 Jefferson St • Flat Rock • (419) 483-6778
USPS • 202 W Center St • Fostoria • (419) 435-6651
USPS • 108 S Broadway St • Green Springs • (419) 639-2432
USPS • 6047 Main St • Kansas • (419) 986-5881
USPS • 13 N Perry St • New Riegel • (419) 595-2216
USPS • 8064 Main St • Old Fort • (419) 992-4425
USPS • 300 Madison St • Republic • (419) 585-5901
USPS • 175 S Monroe St • Tiffin • (419) 447-6323
Zoning Dept • 213 S Main St • Fostoria • (419) 435-8243
Alan Kaminsky Jewelers • 111 S Main St • Fostoria • (419) 435-3505
ALDI • 2124 W Market St • Tiffin • Not Available
Big Lots • 644 W Market St • Tiffin • (419) 448-8141
Burkes Outlet • 646 W Market St • Tiffin • (567) 268-2006
Cakes Phat • 46 Clay St • Tiffin • (567) 220-6118
Cheryl's Cake Shoppe-Supplies • 632 Woodward Ave • Fostoria • (419) 435-5550
Clouse Custom Butchering LLC • 187 S Washington St • Tiffin • Not Available
Deena's Cakes & Cookies • 241 E Eagle St • Fostoria • (419) 701-7275
Dollar General • 14068 E US Highway 224 • Attica • (419) 964-6607
Dollar General • 101 Perry St • Fostoria • (567) 245-1120
Dollar General • 166 E Lytle St • Fostoria • (419) 379-3045
Dollar General • 3939 State Route 12 • Kansas • (419) 455-1500
Dollar Tree • 215 E Lytle St • Fostoria • (419) 701-6025
Dollar Tree • 658 W Market St • Tiffin • (567) 268-6351
Drive Thru • 205 S Sandusky St • Tiffin • (419) 447-6555
Family Dollar • 284 N Washington St • Tiffin • (567) 268-6214
Grain Market Report • • Bascom • (419) 937-2333
Grocery Chasers • 145 Gibson Ct • Tiffin • (419) 618-7384
Handshoe Cakes & Cookies • 6085 E State Route 18 • Republic • (419) 585-7005
Handshoe Cakes & Cookies • 6085 E State Route 18 • Republic • (419) 585-7005
Heritage Iga Tiffin • 479 E Market St • Tiffin • (419) 447-5333
Jeffrey Jewelry • 2449 W Market St • Tiffin • (419) 447-4515
Kroger • 126 W High St • Fostoria • (419) 435-4006
Kroger • 790 W Market St • Tiffin • (419) 447-8199
Kroger Bakery • 126 W High St • Fostoria • (419) 435-4006
Kroger Bakery • 790 W Market St • Tiffin • (419) 447-8199
Kroger Deli • 126 W High St • Fostoria • (419) 435-4006
Kuebler Shoe Store • 440 W Market St • Tiffin • (419) 447-2737
Mccartan Grocery • 41 S Sandusky St • Tiffin • (419) 447-4412
Mohawk Nursery • 2950 S State Route 231 • Tiffin • (419) 447-4486
Molyet Farm Market • 1530 W State Route 18 • Tiffin • (419) 447-9988
Old Fort Country Market • 8080 N Main St • Old Fort • (419) 992-4666
Pandora • 2451 W Market St • Tiffin • (419) 448-4054
Promedica Home Med Eqpt-Tiffin • 424 Wentz St • Tiffin • (419) 447-1104
Ralph's Joy Of Living • 33 N Washington St • Tiffin • (419) 447-1051
Rural King Supply • 2300 State Route 18 • Tiffin • (419) 443-1663
Shoe Sensation • 746 W Market St • Tiffin • (419) 448-7463
Tiffin University Bookstore • 235 Miami St • Tiffin • (419) 448-3437
Tim Hortons • 1630 W Market St • Tiffin • (567) 938-6162
Walmart Bakery • 2801 W State Route 18 • Tiffin • (419) 448-4402
Walmart Supercenter • 2801 W State Route 18 • Tiffin • (419) 448-4402
Whistle Stop Deli • 210 E Lytle St • Fostoria • (419) 436-2205
Arby's • 760 W Market St • Tiffin • (419) 447-3665
Asian Grill Buffet • 870 W Market St # 135 • Tiffin • (419) 455-9688
Back Door Bar & Drive Thru LLC • 311 W Lytle St • Fostoria • (419) 435-7345
Backroads Diner • 603 N Main St • Attica • (419) 426-5000
Bascom Carry-Out • 5890 W Tiffin St • Bascom • (419) 937-2267
Bear's Den • 68 E Perry St • Tiffin • (419) 448-0242
Benchwarmers Restaurant-Dlvry • 105 Allen St • Tiffin • (567) 268-9268
Big Dipper • 380 Wentz St • Tiffin • (419) 447-2131
Block Watch • 213 S Main St • Fostoria • (419) 435-4957
Blue Eagle Inn • 218 State St • Bettsville • (419) 986-5639
Bob Evans • 2310 W Market St • Tiffin • (419) 448-7440
Buffalo Wild Wings • 100 S Shaffer Park Dr • Tiffin • (419) 937-9464
Burger King • 683 W Market St • Tiffin • (419) 448-8915
Camden Falls Reception-Cnfrnc • 2460 S State Route 231 • Tiffin • (419) 448-7699
Carmella's Grill & Bar • 2458 S State Route 231 • Tiffin • (419) 448-7699
Carmies Grill & Bar • 2460 S State Route 231 • Tiffin • (419) 448-7699
Chipotle Mexican Grill • 596 W Market St # C • Tiffin • (419) 448-1477
Clover Club • 266 S Washington St • Tiffin • (419) 448-9142
Cook • 26 N Main St • Attica • (419) 426-3491
Corner Restaurant • 7980 E US Highway 224 • Bloomville • (419) 983-5255
Denny's • 315 W Market St • Tiffin • (419) 447-9249
Domino's • 255 W South St • Fostoria • (419) 435-5000
Domino's Pizza • 240 W Market St • Tiffin • (419) 447-4992
DQ • 1204 N Countyline St • Fostoria • (419) 435-7858
Dunkin' • 1804 W Market St • Tiffin • (567) 220-6878
Empire • 138 S Washington St • Tiffin • (419) 448-7733
Fathead's Family Rstrnt-Lounge • 218 Washington St • Republic • (419) 585-4263
Flippin Jimmy's • 118 W North St • Fostoria • (419) 701-7062
Fort Ball Pizza Palace • 91 N Washington St • Tiffin • (419) 448-9685
Fort Ball Pizza Palace & Fine • 111 Melmore St • Tiffin • (419) 447-3333
Fostoria Dells Inc • 224 S Main St • Fostoria • (419) 435-9947
Fostoria Pizza Palace • 119 W Center St • Fostoria • (419) 435-1807
Frisch's Big Boy • 800 W Market St • Tiffin • (419) 447-3383
Front 9 • 6730 Township Road 69 • Kansas • (419) 558-6463
G & L Shell • 2942 S State Route 100 • Tiffin • (419) 443-1990
Golden Crown Restaurant • 126 Dwight St • Tiffin • (419) 448-9591
Gw's Fine Food & Spirits • 275 S Washington St • Tiffin • (419) 443-1510
Heavenly Pizza Tiffin • 2 Main St • Tiffin • (419) 448-1427
Hong Kong Restaurant • 339 W Lytle St • Fostoria • (419) 435-1222
Hunan King • 253 S Washington St • Tiffin • (419) 448-8889
Jac & Do's Pizza • 283 S Washington St • Tiffin • (419) 447-0196
Jb Twister • 335 W Lytle St • Fostoria • (419) 435-1963
Jimmy John's • 2161 W Market St • Tiffin • (567) 220-6539
K & D Main Street Pizza LLC • 317 S Main St • Fostoria • Not Available
Kemosebe's Roadhouse Grill • 820 Sandusky St • Fostoria • (419) 435-3000
KFC • 2004 W State Rte 18 • Tiffin • (419) 448-9472
Lee's Famous Recipe Chicken • 115 N Washington St • Tiffin • (419) 448-4676
Little Caesars • 708 N Union St • Fostoria • (419) 435-7000
Little Caesars • 318 W Market St • Tiffin • (419) 448-5000
Long John Silver's • 2004 W State Route 18 • Tiffin • (419) 448-9472
Madison Street Tavern • 92 Madison St • Tiffin • (419) 448-9670
Main Street Pizza • 317 N Main St • Fostoria • (567) 245-8188
Marco's Pizza • 301 N Main St • Fostoria • (419) 435-1500
Marco's Pizza • 75 Melmore St • Tiffin • (419) 448-4900
Mc Donald's • 620 N Countyline St • Fostoria • (419) 436-7534
Mc Donald's • 1714 W State Rte 18 • Tiffin • (419) 447-5925
Napoli Pizza • 378 W Market St • Tiffin • (419) 447-2242
New Riegel Cafe • 14 N Perry St • New Riegel • (419) 595-2441
New Riegel Moose Lodge • 13 E Tiffin St • New Riegel • (419) 595-2229
One Thirty Eight • 138 S Washington St • Tiffin • (419) 448-7733
Panda Express • 840 W Market St • Tiffin • (567) 302-2807
Papa Jimmie's • 121 S Broadway St • Green Springs • (419) 639-3700
Paulette's • 238 S Sandusky St • Tiffin • (419) 443-0331
Penn Station East Coast Subs • 596 W Market St • Tiffin • (567) 220-7741
Pioneer Mill Of Tiffin • 255 Riverside Dr • Tiffin • (419) 448-0100
Pizza Hut • 432 Wentz St • Tiffin • (419) 448-4746
Pour House • 201 S Broadway St • Green Springs • (419) 507-4078
Put N Pita LLC • 116 S Washington St • Tiffin • Not Available
R Place • 324 S Main St • Fostoria • (419) 435-9876
Red's Pizza • 381 Perry St • Fostoria • (419) 435-2224
Reed's Town Tavern • 1830 N State Route 4 • Attica • (419) 426-9002
Reino's Catering • 73 E Market St • Tiffin • (419) 447-5891
Rosies Soup N Such • 122 Miami St • Tiffin • (419) 448-0616
Sauced LLC • 7889 County Road 10 • New Riegel • (419) 595-3663
Scooterz Pizza • 207 State St • Bettsville • (419) 986-5043
Seneca Restaurant • 4399 S State Route 231 • Tiffin • (419) 447-8325
Shake Shak • 179 N Washington St • Tiffin • (419) 447-9971
Soni Junction • 2860 S US Highway 23 • Alvada • (419) 435-8490
SUBWAY • 1636 N Countyline St • Fostoria • (419) 435-8511
SUBWAY • 1950 W Market St # 3 • Tiffin • (419) 448-0300
SUBWAY • 200 S Sandusky St • Tiffin • (419) 448-8900
T J Willie's • 738 W Market St • Tiffin • (419) 447-2400
Taco Bell • 630 W Market St • Tiffin • (419) 448-8226
Thibodeau's Seneca Lanes • 1090 N US Highway 23 • Fostoria • (419) 435-3990
Tim Hortons • 1630 W Market St • Tiffin • (567) 938-6162
Uncle Mike's Dairy Bar • 274 S Washington St • Tiffin • (419) 447-0036
Wall Street Pub Grille • 235 Miami St • Tiffin • (419) 448-5848
Wendy's • 1104 N Countyline St • Fostoria • (419) 435-6485
Wendy's • 535 W Market St • Tiffin • (419) 447-5271
Wessels Co • 161 Greenfield St • Tiffin • Not Available
Wing Street • 432 Wentz St • Tiffin • (419) 448-4746
Xcaret Mexican Restaurant • 870 W Market St • Tiffin • (419) 443-9898
Bridges Community Academy • 190 Saint Francis Ave # Ofc • Tiffin • (419) 455-9295
Calvert Catholic Elementary • 357 S Washington St • Tiffin • (419) 447-5790
Calvert Catholic High School • 152 Madison St • Tiffin • (419) 447-3844
Columbian High School • 300 S Monroe St • Tiffin • (419) 447-6331
Hopewell Loudon Junior/Senior • 181 N County Road 7 • Bascom • (419) 937-2804
Hopewell-Loudon Elementary Sch • 181 N County Road 7 • Bascom • (419) 937-2804
Krout Elementary School • 20 Glenn St • Tiffin • (419) 447-2652
Lincoln School • 124 Ohio Ave • Tiffin • (419) 447-8674
New Riegel High School • 44 N Perry St • New Riegel • (419) 595-2256
Noble Elementary School • 130 Minerva St • Tiffin • (419) 447-1566
North Central Academy • 928 W Market St # B • Tiffin • (419) 448-5786
Old Fort Elementary Bettsville • 118 Washington St • Bettsville • (419) 986-5166
Old Fort High School • 7635 N County Road 51 • Tiffin • (419) 992-4291
Seneca East Elementary School • 13343 E US Highway 224 • Attica • (419) 426-3344
Seneca East Local • 109 Seneca St • Attica • (419) 426-3312
Seneca East Middle/High School • 13343 E US Highway 224 • Attica • (419) 426-3312
Tiffin City School Noble • 130 Minerva St • Tiffin • (419) 447-1566
Tiffin Junior High School • 138 E Market St • Tiffin • (419) 447-4149
Tiffin Middle School • 103 Shepherd Dr • Tiffin • (419) 447-3358
Washington Elementary School • 151 Elmer St • Tiffin • (419) 447-1072