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Miscellaneous Information

Various Identification Codes ...

GNIS Codes ...

The U.S. Board on Geographic Names (BGN) was created to address the problems caused by spelling and naming variations. The BGN will usually recognize an existing name or, when necessary, establish a name for a geographic feature (such as a mountain, lake, river, stream, city, town, village, dam, bridge, etc).

The BGN names are kept in a database called the Geographic Names Information System (GNIS) and it is the official Federal repository. The GNIS is operated and maintained by the U.S. Geological Survey (USGS).

A unique and permanent numeric identifier has been assigned for each name in the GNIS database. These names and identifiers are definitive and it is intended that they are to be used by all departments of the Federal Government:

GNIS ID for Donaldsonville: 2404233

GNIS ID for Ascension Parish: 558403

GNIS ID for Louisiana: 1629543

FIPS Codes ...

In a past effort, various federal agencies created a set of codes with a purpose similar to the GNIS codes. These codes are called the Federal Information Processing Standard (or the FIPS 55 codes). Although they are still used by some organizations, the FIPS codes are obsolete and will ultimately be replaced by the GNIS codes.

The following FIPS codes apply to Donaldsonville:

Place (Community) Code:  21240
State Code:  22 (Louisiana)
County Code:  005 (Ascension Parish)

Since the Place and County FIPS codes are not unique and can be repeated in other States, it's necessary to combine the State code with the Place and County FIPS codes to uniquely identify them - for example:

State/Place Code:  22/21240
State/County Code:  22/005

As already mentioned, the FIPS codes are to be replaced by the GNIS codes. The following reflect those changes:

 FIPS Code
translates to    
State of Louisiana:    22   1629543
Ascension Parish:    22/005   558403
Donaldsonville:    22/21240   2404233

GPS Location - GNIS vs Census ...

An important aspect of the GNIS code is that it assigns a GPS location (the latitude/longitude) to the geographic feature. This location is simply a point on the map and does not represent the size or shape of the feature. In the case of Donaldsonville, it is a point within Donaldsonville that might be a post office, the city hall or simply an intersection - the point should really be considered arbitrary and only indicating a general location.

For Donaldsonville, the GNIS GPS location is given as:

Lat:   30° 5' 43"   (or 30.1°)

Lon:   -90° 59' 33"   (or -90.99°)  

Determined by its statistical needs, the Census Bureau has defined a sampling area for Donaldsonville - this area also contains a map point. As with the GNIS code, the location of the Census point should be considered as being arbitrary within the sampling area.

For Donaldsonville, the Census 2010 GPS location is given as:

Lat:   30° 5' 42"   (or 30.1°)

Lon:   -90° 59' 33"   (or -90.99°)  

The map point defined by the Census Bureau lies 119.3 feet to the south<1> of the point given by the GNIS (see above).

You might note that the GPS location given for the 2010 Census is different than the location that was specified by the 2000 Census:

Lat:   30° 5' 59"   (or 30.1°)

Lon:   -90° 59' 38"   (or -90.99°)  

The GPS location given for the 2000 Census lies 1,840 feet to the north<2> of the point given by the 2010 Census.

Regional Codes ...

For statistical purposes, the US Census Bureau has divided the country into four Regions. Donaldsonville is located in Region #3 (the South Region).

In turn, the US Census Bureau has further divided each Region into Divisions. Donaldsonville is located in Division #7 (the West South-Central Division).

The Office of Management and Budget (OMB) has created ten Federal Regions. Donaldsonville is located in Region VI (Region 6).

The Federal Emergency Management Agency (FEMA) has created ten Management Regions. Donaldsonville is located in Region VI (Region 6).

ZIP Codes ...

While some people have used a ZIP code to identify a community, the purpose of the ZIP code was to make mail delivery more efficient by grouping addresses together. Although the ZIP Code doesn't specifically identify a city like Donaldsonville, it does identify addresses that are in (or near) Donaldsonville. It's important to remember that the boundaries of a ZIP Code are defined by the needs of the USPS and can be changed, re-assigned or overlapped with other ZIP Codes.

The ZIP code for Donaldsonville: 70346<3>

Referenced GNIS Records ...

GNIS ID #1629933   (Name of Record: Donaldsonville)

Class: populated place

A place or area having clustered or scattered buildings and a permanent population (such as a city, settlement, town or village). The boundaries may or may not coincide with the perceived population.

A 'populated place' record may have a corresponding 'census' or 'civil' record. The information contained in the 'populated place' record applies only to the class and should not be confused with either the 'census' and 'civil' classes.

County: Ascension

Map Name: Donaldsonville

Lat: 30.1010323       Lon: -90.9928773  

Elev: 7 ft.

GNIS ID #2404233   (Name of Record: City of Donaldsonville)

Class: civil

A political division formed for administrative purposes (such as a borough, county, incorporated place, parish, town or township).

A 'civil' record may have a corresponding 'census' or 'populated place' record. The information contained in the 'civil' record applies only to the class and should not be confused with either the 'census' and 'populated place' classes.

County: Ascension

Map Name: Donaldsonville

Lat: 30.0953957       Lon: -90.992529  

Elev: 6 ft.

Referenced FIPS Records ...

FIPS Code: 22/21240   (Place Name: Donaldsonville)

County: Ascension     (FIPS State/County: 22/005)

Class: C1

Identifies an incorporated place (ie- Donaldsonville) that does not serve as a primary county division - or in other words, it is included in and is part of a primary county division (ie- Ascension Parish).

GSA Code: 610

MRF Code: 340

MSA Code: 760

Unfortunately, we don't know of a website for Donaldsonville. If you can help, please contact us through our Feedback Page.

The official website for Ascension Parish:

The official website for State of Louisiana:

The official website of the U.S. Board on Geographic Names (BGN)

The official website of the U.S. Geological Survey (USGS)

The official website of the U.S. Census Bureau

The official website of the U.S. Office of Management and Budget (OMB)

The official website of the U.S. Federal Emergency Management Agency (FEMA)

Footnotes ...

<1>The calculated bearing (or angle) to the GNIS-supplied location is 177 degrees and a distance of 119.3 feet.
<2>The calculated bearing (or angle) to the 2000 Census location is 14 degrees and a distance of 1,840 feet.
<3>When looking for a ZIP Code, whether Donaldsonville or elsewhere, it's always best to check the website of the United States Postal Service (USPS).


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This page was last modified/updated: 07 Apr 2024