As of the 2020 U.S. census, the township's population was 17,400,[9][10] an increase of 627 (+3.7%) from the 2010 census count of 16,773,[22][23] which in turn reflected an increase of 992 (+6.3%) from the 15,781 counted in the 2000 census.[24]
Holmdel Township was formed by an act of the New Jersey Legislature on February 23, 1857, from portions of Raritan Township (now Hazlet).[25] The origin of the township's name is unclear, with some sources indicating that it was named for the Holmes family, who were early settlers of the area, while others point to Dutch language words holm and del, meaning 'pleasant valley'.[26][27]
Holmdel's picturesque beauty, proximity to New York City, and main highways, award-winning public schools, large homes, rich history, the PNC Bank Arts Center, and the presence of many high paying jobs within commuting distance led the township to be ranked the #1 "Six-Figure Town" by Money magazine and CNN for 2009.[30]
The township has been one of the state's highest-income communities. Based on data from the American Community Survey (ACS) for 2013–2017, Holmdel Township residents had a median household income of $155,842, ranked 10th in the state among municipalities with more than 10,000 residents, more than double the statewide median of $76,475.[31] Based on data from the 2006–2010 ACS, Holmdel had a per-capita income of $62,120, ranked 46th in the state.[32]
^Penzias and Wilson discover cosmic microwave radiation - 1965Archived August 10, 2017, at the Wayback MachinePBS. Accessed July 13, 2011. "Bell Labs built a giant antenna in Holmdel, New Jersey, in 1960. It was part of a very early satellite transmission system called Echo.... Since Penzias, Wilson, and Dicke's work, all that has changed. The measurement of cosmic background radiation, as the Holmdel telescope's noise is now called), combined with Edwin Hubble's much earlier finding that the galaxies are rushing away, makes a strong case for the big bang. By the mid 1970s, astronomers called it 'the standard model.' Arno Penzias and Robert Wilson received the Nobel Prize in physics in 1978."
^Cite error: The named reference CNN2009 was invoked but never defined (see the help page).
^Raychaudhuri, Disha. "The wealthiest towns in N.J., ranked"Archived November 4, 2019, at the Wayback Machine, NJ Advance Media for NJ.com, June 7, 2019. Accessed November 4, 2019. "The median household income in N.J. is $76,475, recent Census data shows.... A note about the data: The data comes from 2013–2017 American Community Survey conducted by U.S. Census Bureau. Smaller towns with less than 10,000 residents were excluded from the list.... 10. Holmdel, Monmouth County Median income: $155,842"