[5] Comal County is part of the San Antonio-New Braunfels, TX metropolitan statistical area.

As a result of this growth, the counties have experienced new home construction, traffic congestion, and greater demand for public services.

Bexar County, which includes San Antonio, grew by 1.75% during the year, but its number of new residents exceeded 33,000.

[6] Count Castell[27] of the Adelsverein negotiated with the separate Darmstadt Society of Forty to colonize 200 families on the Fisher–Miller Land Grant territory in Texas.

The colonies failed after the Adelsverein funding expired, and also due to conflict of structure and authorities.

The Guadalupe River flows generally southeastward through the county, and is impounded by Canyon Lake.

A Williams Institute analysis of 2010 census data found there were about 4.4 same-sex couples per 1,000 households in the county.

Comal is a strongly Republican county: the last Democrat to carry it being Texan Lyndon B. Johnson in 1964, and no others have done so since Franklin Roosevelt’s 1936 landslide when he won every Texas county bar traditionally Unionist Gillespie and Kendall and took 87.31 percent of the Lone Star State’s vote.

In earlier periods, the county’s German heritage meant it often deviated from a "Solid South" voting pattern.