Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Middle Bass Post Office | Post Office | 176 | Ottawa | 41 40 53 N | 082 48 46 W |
| Middle Bass School | School | 176 | Ottawa | 41 40 52 N | 082 48 45 W |
| Middle Bass-East Point Airport | Airport | 176 | Ottawa | 41 41 40 N | 082 47 50 W |
| Middle Harbor | Bay | 175 | Ottawa | 41 33 16 N | 082 48 44 W |
| Middle Harbor Shoal | Bar | 174 | Ottawa | 41 34 07 N | 082 47 41 W |
| Middle Harbor Trail | Trail | 178 | Ottawa | 41 32 57 N | 082 49 13 W |
| Middleton (historical) | Populated Place | 183 | Ottawa | 41 32 46 N | 083 16 23 W |
| Millers Dock | Locale | 174 | Ottawa | 41 39 17 N | 082 49 22 W |
| Mineyahta-on-the Bay | Populated Place | 176 | Ottawa | 41 30 48 N | 082 44 30 W |
| Monument Pond (historical) | Lake | 175 | Ottawa | 41 39 13 N | 082 48 44 W |
| Moore Point | Cape | 174 | Ottawa | 41 34 36 N | 082 51 35 W |
| Mother of Sorrows Catholic Church | Church | 180 | Ottawa | 41 38 59 N | 082 49 19 W |
| Mouse Island | Island | 176 | Ottawa | 41 35 28 N | 082 49 59 W |
| Mouse Island Reef | Bar | 174 | Ottawa | 41 36 24 N | 082 49 58 W |
| Muddy Creek | Stream | | Ottawa | 41 27 18 N | 083 02 06 W |
| Muddy Creek Bay | Bay | 174 | Ottawa | 41 27 22 N | 083 00 08 W |
| Navarre Marsh | Swamp | 175 | Ottawa | 41 35 35 N | 083 04 30 W |
| Negro Island (historical) | Island | 174 | Ottawa | 41 27 37 N | 082 58 19 W |
| Niagra Reef | Bar | 174 | Ottawa | 41 39 56 N | 082 58 30 W |
| Ninemile Creek | Stream | | Ottawa | 41 28 08 N | 083 10 24 W |
| North Bass Elementary School | School | 179 | Ottawa | 41 42 59 N | 082 48 58 W |
| North Bass Island | Island | 177 | Ottawa | 41 43 00 N | 082 48 60 W |
| North Bass Island Airport | Airport | 178 | Ottawa | 41 43 10 N | 082 49 25 W |
| North Bass Island Cemetery | Cemetery | 180 | Ottawa | 41 43 03 N | 082 49 04 W |
| North Branch Turtle Creek | Stream | | Ottawa | 41 34 38 N | 083 18 25 W |
| North Swimming Beach | Beach | 175 | Ottawa | 41 33 28 N | 082 48 10 W |
| Northwest Reef | Bar | 174 | Ottawa | 41 44 19 N | 082 51 08 W |
| Oak Harbor | Populated Place | 177 | Ottawa | 41 30 24 N | 083 08 48 W |
| Oak Harbor High School | School | 179 | Ottawa | 41 30 50 N | 083 09 25 W |
| Oak Harbor Middle School | School | 178 | Ottawa | 41 30 46 N | 083 08 54 W |
| Oak Harbor Post Office | Post Office | 178 | Ottawa | 41 30 31 N | 083 08 50 W |
| Oak Harbor Public Library | Building | 178 | Ottawa | 41 30 31 N | 083 08 49 W |
| Oak Harbor United Methodist Church | Church | 178 | Ottawa | 41 30 37 N | 083 08 14 W |
| Ohio State University Extension | School | 175 | Ottawa | 41 39 27 N | 082 49 21 W |
| Orib Boat Club | Locale | 175 | Ottawa | 41 31 21 N | 082 42 58 W |
| Ottawa County | Civil | 177 | Ottawa | 41 32 00 N | 083 06 00 W |
| Ottawa County Courthouse | Building | 178 | Ottawa | 41 30 35 N | 082 56 26 W |
| Ottawa County Fairgrounds | Locale | 175 | Ottawa | 41 30 25 N | 083 05 07 W |
| Ottawa County Home | Locale | 175 | Ottawa | 41 30 23 N | 083 05 31 W |
| Ottawa County Law Library | Building | 178 | Ottawa | 41 30 35 N | 082 56 26 W |
| Ottawa County Nursing Home | Building | 175 | Ottawa | 41 30 23 N | 083 05 27 W |
| Ottawa National Wildlife Refuge | Park | 175 | Ottawa | 41 36 56 N | 083 12 58 W |
| Our Lady of Lords School | School | 192 | Ottawa | 41 30 45 N | 083 21 39 W |
| Our Lady of Lourdes Catholic Church | Church | 191 | Ottawa | 41 30 45 N | 083 21 34 W |
| Packer Creek | Stream | | Ottawa | 41 34 40 N | 083 09 45 W |
| Peace Lutheran Church | Church | 177 | Ottawa | 41 30 31 N | 082 56 36 W |
| Peach Orchard Point | Cape | 174 | Ottawa | 41 39 32 N | 082 49 30 W |
| Perry Memorial Monument Light | Locale | 175 | Ottawa | 41 39 15 N | 082 48 42 W |
| Perry Park | Park | 177 | Ottawa | 41 39 12 N | 082 49 02 W |
| Perry's Victory and International Peace Memorial | Park | 175 | Ottawa | 41 39 15 N | 082 48 40 W |
| Piccola (historical) | Populated Place | 178 | Ottawa | 41 31 08 N | 082 46 53 W |
| Piccolo Post Office (historical) | Post Office | 178 | Ottawa | 41 31 10 N | 082 46 55 W |
| Point Marblehead | Cape | 175 | Ottawa | 41 32 10 N | 082 42 42 W |
| Port Clinton | Populated Place | 177 | Ottawa | 41 30 43 N | 082 56 16 W |
| Port Clinton City Hall | Building | 177 | Ottawa | 41 30 43 N | 082 56 17 W |
| Port Clinton East Pierhead Light | Locale | 174 | Ottawa | 41 31 08 N | 082 56 08 W |
| Port Clinton Golf Course | Locale | 176 | Ottawa | 41 30 51 N | 083 01 37 W |
| Port Clinton High School | School | 177 | Ottawa | 41 30 13 N | 082 56 16 W |
| Port Clinton Light | Locale | 174 | Ottawa | 41 31 08 N | 082 56 10 W |
| Port Clinton Plaza Shopping Center | Locale | 173 | Ottawa | 41 30 49 N | 082 55 13 W |
| Port Clinton Post Office | Post Office | 176 | Ottawa | 41 30 42 N | 082 56 32 W |
| Portage Elementary School | School | 180 | Ottawa | 41 30 28 N | 082 52 13 W |
| Portage River | Stream | | Ottawa | 41 30 59 N | 082 56 14 W |
| Put-in-Bay | Bay | 174 | Ottawa | 41 39 30 N | 082 48 60 W |
| Put-in-Bay | Populated Place | 174 | Ottawa | 41 39 15 N | 082 49 15 W |
| Put-in-Bay Airport | Airport | 174 | Ottawa | 41 38 00 N | 082 49 40 W |
| Put-in-Bay High School | School | 180 | Ottawa | 41 39 02 N | 082 49 16 W |
| Put-in-Bay Post Office | Post Office | 180 | Ottawa | 41 39 03 N | 082 49 09 W |
| Put-in-Bay Refuge Harbor | Harbor | 174 | Ottawa | 41 39 15 N | 082 49 05 W |
| Put-in-Bay Yacht Club | Locale | 177 | Ottawa | 41 39 15 N | 082 49 24 W |
| R C Waters Elementary School | School | 180 | Ottawa | 41 31 12 N | 083 09 09 W |
| Rattlesnake Island | Island | 179 | Ottawa | 41 40 45 N | 082 50 60 W |
| Rattlesnake Island Airport | Airport | 179 | Ottawa | 41 40 45 N | 082 50 50 W |
| Resurrection Lutheran Church | Church | 177 | Ottawa | 41 30 41 N | 082 56 12 W |
| Rice Cemetery | Cemetery | 186 | Ottawa | 41 29 00 N | 083 17 14 W |
| Ritter Marsh | Swamp | 175 | Ottawa | 41 37 08 N | 083 12 25 W |
| Riverview Cemetery | Cemetery | 178 | Ottawa | 41 30 35 N | 082 57 36 W |
| Riverview School | School | 176 | Ottawa | 41 30 27 N | 083 05 35 W |
| Rocky Ridge | Populated Place | 185 | Ottawa | 41 32 00 N | 083 12 45 W |
| Rocky Ridge Elementary School | School | 184 | Ottawa | 41 31 57 N | 083 12 57 W |
| Rockyridge Post Office | Post Office | 184 | Ottawa | 41 31 55 N | 083 12 46 W |
| Roose Cemetery | Cemetery | 176 | Ottawa | 41 29 40 N | 083 07 37 W |
| Round Reef | Bar | 174 | Ottawa | 41 37 00 N | 082 59 17 W |
| Rusha Cemetery | Cemetery | 176 | Ottawa | 41 29 29 N | 083 07 20 W |
| Rusha Creek | Stream | | Ottawa | 41 35 04 N | 083 04 01 W |
| Russian Cemetery | Cemetery | 204 | Ottawa | 41 32 01 N | 082 44 14 W |
| Sackett Cemetery | Cemetery | 184 | Ottawa | 41 31 49 N | 082 47 14 W |
| Saint Boniface Catholic Church | Church | 178 | Ottawa | 41 30 39 N | 083 08 53 W |
| Saint Boniface School | School | 179 | Ottawa | 41 30 39 N | 083 08 55 W |
| Saint Johns Evangelical Lutheran Church | Church | 178 | Ottawa | 41 30 37 N | 083 08 51 W |
| Saint Johns United Church of Christ | Church | 187 | Ottawa | 41 28 37 N | 083 17 35 W |
| Saint Johns United Church of Christ | Church | 190 | Ottawa | 41 31 32 N | 083 21 24 W |
| Saint Joseph Cemetery | Cemetery | 175 | Ottawa | 41 35 13 N | 083 09 53 W |
| Saint Josephs Catholic Church | Church | 186 | Ottawa | 41 32 29 N | 082 44 07 W |
| Saint Josephs Cemetery | Cemetery | 206 | Ottawa | 41 32 04 N | 082 44 18 W |
| Saint Josephs School | School | 186 | Ottawa | 41 32 29 N | 082 44 06 W |
| Saint Mary Byzantine Catholic Church | Church | 181 | Ottawa | 41 32 26 N | 082 43 23 W |
| Saint Marys Byzantine Catholic Cemetery | Cemetery | 180 | Ottawa | 41 32 28 N | 082 43 21 W |
| Saint Paul Lutheran Church of Danbury | Church | 183 | Ottawa | 41 31 27 N | 082 48 28 W |
| Saint Paul Trinity United Methodist Church | Church | 188 | Ottawa | 41 28 28 N | 083 17 37 W |
| Saint Paul United Church of Christ | Church | 179 | Ottawa | 41 30 35 N | 083 09 08 W |
| Saint Pauls Church | Church | 176 | Ottawa | 41 29 21 N | 083 07 18 W |
| Saint Pauls Church | Church | 176 | Ottawa | 41 30 39 N | 082 55 41 W |
| Saint Pauls Church | Church | 181 | Ottawa | 41 39 00 N | 082 49 22 W |
| Saint Pauls Lutheran Church Cemetery | Cemetery | 183 | Ottawa | 41 31 27 N | 082 48 18 W |
| Saint Thomas Episcopal Church | Church | 177 | Ottawa | 41 30 42 N | 082 56 19 W |
| Sand Beach | Populated Place | 175 | Ottawa | 41 36 35 N | 083 05 45 W |
| Sand Beach Marsh | Swamp | 175 | Ottawa | 41 36 20 N | 083 05 40 W |
| Sandusky Bay | Bay | 174 | Ottawa | 41 28 44 N | 082 50 29 W |
| Schmardebeck Ditch | Canal | 176 | Ottawa | 41 30 33 N | 082 50 07 W |